Started on Sep 14, 2026.
United States todayLive
True view
Fire view
Fire view (right): infrared (SWIR), sees through smoke and brings out the heat.
🟢 green = vegetation
🟤 brown = already burned
🟠 orange = fire right now
Drag to compare: normal photo on the left, heat brought out on the right.
Green: vegetationBrown: already burnedOrange: fire right nowSentinel-2 · Copernicus
Red dots: heat detected by satellite in the last 48h. NASA FIRMS
Quick facts
- Location
- Big Horn County
- Cause
- Natural
- Jurisdiction
- BIA · Federal land
Burning for 18 days across Big Horn, Montana, the active Mm 13 Fire has maintained an average daily growth of approximately 22 acres per day, accumulating a total size of 400 acres on Federal land managed by the BIA. Sparked naturally on September 14, 2026, the incident unfolds within a regional fire season that typically spans from June to October.
This Montana blaze is part of a broader national picture in 2026, where 3,318,049 hectares have burned so far, marking a total that is 39 percent below the two-decade average.
In context
This wildfire has been burning in Montana for 18 days. So far it has affected roughly 400 acres — about 1.6 km².
In the Northern Hemisphere, wildfire activity usually peaks during the warm, dry months — roughly May through October.
The bigger picture in United States
Across United States, roughly 3,318,049 hectares have burned so far in 2026 — 39% below the two-decade average. Data from Copernicus GWIS.
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Reports from people near the fire · unverified
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