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Combined exposures · Flooding, evacuation & humid heat

Flood exposure and what it compounds with in Texas

Flood exposure rarely arrives alone. In some Texas ZIP codes it overlaps with a second exposure that changes what flooding means there — how many households have no car to leave in, or how many humid-heat days the area already carries. This page is scoped to Texas, because these overlaps are regional patterns.

TexasData release 2026Mapped, survey & modeled inputs

Across parts of Texas, flood exposure shows up in the same ZIP codes as one of two other measurements. Here is exactly what each of the three measurements is, what kind of instrument produced it, and what reference level it does — and does not — have.

How we measure this →
Flood exposureFEMA flood mapMapped · not modeled

This is how much of a ZIP code's land sits inside the 1% annual-chance floodplain — the area FEMA maps as the Special Flood Hazard Area, often nicknamed the "100-year floodplain." Despite that nickname it does not mean one flood per century: the 1% chance applies every single year, so such floods can strike in back-to-back years. It is read off FEMA's published flood maps rather than modeled, and it describes land, not any particular home.

FEMA National Flood Hazard Layer — the Special Flood Hazard Area (1% annual chance). A federal flood-map designation of land; it is not a health limit, and no ZIP on this page is described as having crossed a safety line.

Households with no vehicleCensus survey estimateACS · ZCTA-native

This is the share of households in a ZIP code with no vehicle available, from the Census Bureau's American Community Survey. It counts households rather than people, it is an estimate drawn from a sample rather than a full census, and it says nothing about why a household has no car. Next to flood exposure it is a logistical fact and nothing more: an evacuation that assumes a car is harder without one.

US Census Bureau, American Community Survey — a survey estimate carrying sampling error. There is no federal reference level for this measure, and none is implied.

Humid-heat daysModeled heat stressOccupational reference — not federal

This is the average number of days a year when the daily-high wet-bulb globe temperature reaches 28 °C — a heat-stress measure that combines temperature, humidity, sun and wind. Humidity matters because it slows the body's main way of cooling itself, sweat evaporating from the skin, so the same air temperature is harder on the body when the air is humid. The count is modeled across a 2011–2020 climatology, not measured at your address.

Cornell wet-bulb globe temperature data. The 28 °C line comes from NIOSH/ACGIH occupational heat-stress guidance written for workplaces — it is not a federal environmental limit, and reaching it is not a regulatory exceedance.

What this is — and isn't. These are separate exposures recorded for the same place. This page does not claim one causes another, does not combine them into a single risk number, does not rank areas by how pronounced an overlap is, and does not connect any of them to a health outcome. It reports where two figures are elevated together, and nothing more.

Evacuation vulnerability in Texas

Flood exposureHouseholds with no vehicle

The Texas ZIP codes (ZCTAs) that rank among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle. The ranking is national; this list is Texas only. Two separate facts recorded for the same place — leaving ahead of water is a harder logistical problem without a car.

  • 77951in Bloomington

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 75933in Call

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 77415in Cedar Lane

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 78012in Christine

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 78401in Corpus Christi

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 75215in Dallas

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 78622in Fentress

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 77550in Galveston

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 77859in Hearne

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 77026in Houston

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 77060in Houston

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 77074in Houston

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 77867in Mumford

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 75861in Tennessee Colony

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 77991in Vanderbilt

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

  • 77597in Wallisville

    This area ranks among the highest 10% of US ZIP codes for both flood exposure and the share of households without a vehicle.

Dual climate exposure in Texas

Humid-heat daysFlood exposure

The Texas ZIP codes (ZCTAs) that rank among the highest 10% of US ZIP codes for both humid-heat days and flood exposure. The ranking is national; this list is Texas only. Two separate climate exposures that land in the same places here.

  • 77511in Alvin

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77514in Anahuac

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77515in Angleton

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78336in Aransas Pass

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78725in Austin

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78742in Austin

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77950in Austwell

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78339in Banquete

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77414in Bay City

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78340in Bayside

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77520in Baytown

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77401in Bellaire

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77951in Bloomington

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77420in Boling

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75928in Bon Wier

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77422in Brazoria

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77611in Bridge City

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77423in Brookshire

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78521in Brownsville

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77807in Bryan

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77612in Buna

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75933in Call

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77837in Calvert

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77415in Cedar Lane

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78012in Christine

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77327in Cleveland

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77428in Collegeport

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77304in Conroe

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77385in Conroe

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78417in Corpus Christi

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77533in Daisetta

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77430in Damon

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77534in Danbury

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77432in Danevang

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77538in Devers

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77614in Deweyville

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75941in Diboll

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77539in Dickinson

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75560in Douglassville

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78351in Driscoll

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77434in Eagle Lake

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77436in Egypt

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78938in Ellinger

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75944in Etoile

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78622in Fentress

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77541in Freeport

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77617in Gilchrist

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77443in Glen Flora

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77560in Hankamer

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77859in Hearne

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77623in High Island

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77562in Highlands

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77563in Hitchcock

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77025in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77026in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77038in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77039in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77040in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77043in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77050in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77058in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77060in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77072in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77074in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77082in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77084in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77089in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77093in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77096in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77099in Houston

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78362in Ingleside

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77583in Iowa Colony

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77493in Katy

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77565in Kemah

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77451in Kendleton

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77339in Kingwood

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77345in Kingwood

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78548in La Grulla

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77568in La Marque

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77571in La Porte

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77566in Lake Jackson

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77575in Liberty

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 76554in Little River-Academy

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77577in Liverpool

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77971in Lolita

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78566in Los Fresnos

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77657in Lumberton

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75148in Malakoff

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77578in Manvel

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78655in Martindale

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77457in Matagorda

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78123in Mc Queeney

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77973in Mcfaddin

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77867in Mumford

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77868in Navasota

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78142in Normanna

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78370in Odem

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77360in Onalaska

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77630in Orange

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77632in Orange

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77465in Palacios

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78143in Pandora

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78144in Panna Maria

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77507in Pasadena

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77466in Pattison

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77581in Pearland

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77467in Pierce

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77468in Pledger

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77978in Point Comfort

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77650in Port Bolivar

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77979in Port Lavaca

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78598in Port Mansfield

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77982in Port O Connor

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78661in Prairie Lea

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75573in Redwater

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75784in Reklaw

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77406in Richmond

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 76706in Robinson

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78382in Rockport

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78243in San Antonio

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78590in San Perlita

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78593in Santa Rosa

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77586in Seabrook

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77983in Seadrift

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77371in Shepherd

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77656in Silsbee

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75574in Simms

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77476in Simonton

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77878in Snook

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77879in Somerville

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 78597in South Padre Island

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77386in Spring

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77660in Spurger

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77479in Sugar Land

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77480in Sweeny

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75861in Tennessee Colony

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77481in Thompsons

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77990in Tivoli

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77482in Van Vleck

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77991in Vanderbilt

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77662in Vidor

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77483in Wadsworth

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77485in Wallis

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77597in Wallisville

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77486in West Columbia

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77488in Wharton

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 77318in Willis

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

  • 75980in Zavalla

    This area ranks among the highest 10% of US ZIP codes for both humid-heat days and flood exposure.

Coverage & how to read this

Three different kinds of measurement sit behind this page, and they are not interchangeable: flood exposure is read off FEMA's published flood maps, households without a vehicle is a Census survey estimate, and humid-heat days are modeled over a 2011–2020 climatology. None of them is a reading taken at your address. A ZIP reaches a list here by ranking among the highest 10% of US ZIP codes for each of that pair's two measurements; the ranking is national, and the lists themselves are Texas only. A ZIP with an unobservable measurement is shown as not measured, never as "not impacted" — and a ZIP that is measured and simply does not carry an overlap is not listed at all, so absence from a list here is never a claim that a place is fine. Only the flood leg carries a federal designation, and that designation describes land, not a line any ZIP on this page has crossed. Read the full combined-exposure methodology →

Each ZIP links to its full ZipVitals page. Texas only — the national list is on the explainer page.