The wildland-urban interface is where homes and vegetation meet — and where the largest, costliest fires keep happening. 49,374,888 residents live in 1,807 cities flagged by USFA's WUI community list, spanning 11 states.
Color = number of USFA-flagged WUI cities per state. The Mountain West and Southeast carry most of the load.
Sorted by WUI population. Click for the state's full fire profile.
| # | State | WUI cities | Population | 2025 incidents |
|---|---|---|---|---|
| 1 | CA | 700 | 26,981,251 | 136,119 |
| 2 | WA | 226 | 4,500,732 | 43,401 |
| 3 | AZ | 97 | 4,322,019 | 22,925 |
| 4 | CO | 175 | 3,601,603 | 27,218 |
| 5 | UT | 116 | 2,746,321 | 13,134 |
| 6 | OR | 173 | 2,312,939 | 21,617 |
| 7 | NM | 103 | 1,524,132 | 18,303 |
| 8 | NV | 30 | 1,254,500 | 6,508 |
| 9 | ID | 94 | 1,209,941 | 9,476 |
| 10 | MT | 59 | 558,139 | 5,088 |
| 11 | WY | 34 | 363,311 | 2,161 |
2025 NFIRS incident counts and property loss for the largest WUI-flagged cities.
| # | City | State | Population | 2025 incidents | Wildland | Loss |
|---|---|---|---|---|---|---|
| 1 | Albuquerque | NM | 562,551 | 7,830 | 205 | $2.2M |
| 2 | Fresno | CA | 541,528 | 7,510 | 1,168 | $22.8M |
| 3 | Tucson | AZ | 541,033 | 4,925 | 885 | $3.6M |
| 4 | Sacramento | CA | 523,600 | 7,403 | 1,188 | $11.4M |
| 5 | Mesa | AZ | 503,390 | 1,976 | 106 | $14.1M |
| 6 | Colorado Springs | CO | 479,612 | 3,079 | 178 | $6.8M |
| 7 | Long Beach | CA | 462,293 | 3,040 | 184 | $11.4M |
| 8 | Oakland | CA | 437,825 | 39 | 11 | $1.3M |
| 9 | Bakersfield | CA | 404,321 | 2,477 | 269 | $10.4M |
| 10 | Aurora | CO | 387,349 | 1,717 | 164 | $9.1M |
| 11 | Anaheim | CA | 347,111 | 573 | 31 | $3.0M |
| 12 | Stockton | CA | 320,030 | 4,985 | 738 | $19.6M |
| 13 | Henderson | NV | 318,063 | 958 | 78 | $4.3M |
| 14 | Riverside | CA | 316,076 | 1,936 | 292 | $9.7M |
| 15 | Santa Ana | CA | 311,379 | 913 | 40 | $8.7M |
| 16 | Irvine | CA | 304,527 | 300 | 18 | $21.6M |
| 17 | Chula Vista | CA | 276,103 | 1,287 | 175 | $6.2M |
| 18 | Chandler | AZ | 275,618 | 825 | 31 | $2.0M |
| 19 | Gilbert | AZ | 267,267 | 747 | 37 | $4.5M |
| 20 | Reno | NV | 265,196 | 1,586 | 147 | $4.5M |
| 21 | North Las Vegas | NV | 264,022 | 1,262 | 66 | $25.4M |
| 22 | Glendale | AZ | 248,083 | 684 | 43 | $846K |
| 23 | Scottsdale | AZ | 240,537 | 999 | 30 | $2.6M |
| 24 | Boise | ID | 234,192 | 1,158 | 90 | $14.2M |
| 25 | Fremont | CA | 228,795 | 920 | 185 | $4.7M |
| 26 | Spokane | WA | 227,922 | 2,382 | 297 | $9.9M |
| 27 | Santa Clarita | CA | 225,850 | 342 | 27 | $4.6M |
| 28 | San Bernardino | CA | 221,041 | 114 | 5 | $793K |
| 29 | Tacoma | WA | 219,234 | 2,759 | 388 | $6.7M |
| 30 | Modesto | CA | 218,308 | 1,235 | 261 | $9.6M |
| 31 | Moreno Valley | CA | 209,578 | 604 | 60 | $5.5M |
| 32 | Fontana | CA | 209,279 | 443 | 36 | $1.1M |
| 33 | Oxnard | CA | 202,279 | 666 | 39 | $8.4M |
| 34 | Salt Lake City | UT | 201,269 | 1,574 | 167 | $6.8M |
| 35 | Huntington Beach | CA | 197,481 | 462 | 17 | $1.8M |
| 36 | Glendale | CA | 194,512 | 684 | 22 | $200K |
| 37 | Peoria | AZ | 191,292 | 476 | 28 | $901K |
| 38 | Vancouver | WA | 190,700 | 2,074 | 401 | $8.8M |
| 39 | Tempe | AZ | 181,005 | 763 | 34 | $5.8M |
| 40 | Santa Rosa | CA | 178,221 | 1,393 | 189 | $3.3M |
| 41 | Eugene | OR | 176,755 | 1,006 | 350 | $6.4M |
| 42 | Ontario | CA | 176,326 | 1,031 | 62 | $806K |
| 43 | Elk Grove | CA | 176,105 | 616 | 141 | $1.1M |
| 44 | Salem | OR | 175,754 | 832 | 262 | $9.8M |
| 45 | Oceanside | CA | 173,722 | 50 | 11 | $0 |
| 46 | Garden Grove | CA | 171,637 | 394 | 13 | $5.7M |
| 47 | Lancaster | CA | 171,465 | 743 | 86 | $4.7M |
| 48 | Fort Collins | CO | 168,758 | 710 | 44 | $1.4M |
| 49 | Palmdale | CA | 166,895 | 367 | 67 | $3.0M |
| 50 | Salinas | CA | 162,783 | 1,113 | 128 | $5.1M |
WUI flag comes from the USFA Wildland Urban Interface Communities dataset — a federal list of municipalities at heightened wildfire risk because of their proximity to flammable vegetation. The list includes both interface communities (clear edge between built-up and wildland) and intermix communities (homes and wildland mixed together). Incident counts and losses are NFIRS-sourced for 2025. Note: this list is a national snapshot — local risk varies by parcel and is best understood through FEMA's National Risk Index.