Big Rock Fire (ID)

Active · 0% contained · 2,482 acres · started 2026-07-31 · updated 2026-08-03

True color Fire (SWIR)

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True color (left): as the eye sees it.
Infrared / SWIR (right): sees through smoke.

🟢 green = vegetation
🟤 red/brown = burned
🟠 orange = active fire

Imagery: Sentinel-2 (Copernicus). Drag to compare smoke vs. infrared.

Heat detections: NASA FIRMS (last 48h).

Burning through two-foot brush in Jefferson County, the active Big Rock Fire has consumed 2,482 acres since it was ignited by natural causes on July 31, 2026. Located twenty miles east of Idaho Falls, Idaho, the blaze has maintained a steady trajectory over its three days of burning, averaging an estimated 827 acres per day. Fire behavior is currently characterized as active, torching, and exhibiting long-range spotting. Satellites are picking up ten heat signatures clustered nearby over the past forty-eight hours, illustrating the fire's recent spread across federal land managed by the Bureau of Land Management.

A Type 3 Incident Commander oversees a total of 126 personnel responding to the Type 2 Incident, bringing containment to zero percent as costs reach one million dollars. This incident unfolds during the region's typical fire season, which runs from June to October. Nationally, the wildfire activity occurs within a broader context where 2,528,284 hectares have burned so far in 2026, marking a figure 54% below the two-decade average.

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