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Mapped: The U.S. States Building the Most Homes in the Fire Line

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February 18, 2026

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Julia Wendling

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Mapped: The U.S. States Building the Most Homes in the Fire Line

   
Key Takeaways

  • Urban growth is expanding directly into wildfire-prone areas, increasing structural exposure.
  •        

  • The wildland–urban interface (WUI) now includes nearly one-third of U.S. homes, concentrating risk along fire lines.
  •        

  • Each new home in the WUI compounds insurance and recovery challenges, raising costs for mitigation, protection, and rebuilding.
  •        

Urban sprawl is increasingly colliding with climate risk, as more and more homes are being built into the fire line.

This visualization, created in partnership with Inigo, provides visual context to the risk of urban sprawl. Data is from the U.S. Fire Administration.

Growth Is Pushing Housing Into Fire Zones

According to the U.S. Fire Administration, nearly one-third of all U.S. homes now sit in the wildland–urban interface (WUI). These are areas where human development meets high-risk burn zones.

State Number of homes in WUI
California 5,089,397
Texas 3,173,293
Florida 2,586,713
North Carolina 2,113,853
Pennsylvania 1,967,753
Georgia 1,920,046
New York 1,686,022
Arizona 1,461,103
Virginia 1,389,800
South Carolina 1,312,624
Alabama 1,271,160
Massachusetts 1,225,594
Colorado 1,080,835
Michigan 1,064,107
Washington 1,043,366
Tennessee 927,138
New Jersey 884,114
Louisiana 879,906
Ohio 787,712
Connecticut 765,301
Mississippi 725,748
West Virginia 665,808
Maryland 657,306
Oklahoma 651,632
New Mexico 640,093
Oregon 601,454
Kentucky 594,334
Wisconsin 585,984
Maine 579,101
Utah 572,967
Nevada 571,013
Arkansas 557,920
Missouri 518,985
Hawaii 508,193
New Hampshire 493,741
Minnesota 440,237
Illinois 396,295
Montana 321,816
Indiana 320,704
Idaho 297,386
Vermont 236,060
Alaska 219,319
Wyoming 217,708
Kansas 170,952
Rhode Island 145,597
South Dakota 101,947
Nebraska 99,310
Iowa 73,265
North Dakota 57,231
Delaware 44,350
District of Columbia 980

As housing demand rises, construction has accelerated fastest in regions already prone to wildfire. Since 1990, states such as California, Texas, and Florida have each added more than a million homes within the WUI. Most commonly, there are near forests and grasslands that are drying out under rising temperatures and prolonged drought.

Why the WUI Is a Growing Risk Frontier

This expansion doesn’t just raise the likelihood of loss, it multiplies exposure. Every additional home in the WUI increases the cost and complexity of fire protection, evacuation, and recovery, creating a compounding challenge for insurers, reinsurers, and property risk managers.

As development continues along the fire line, mitigation (through land-use planning, building codes, and defensible space) may become the defining frontier of U.S. housing risk. Understanding where and why these overlaps occur is critical for assessing future property exposure.

Explore the data behind emerging global property risks.

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