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
Key facts
Source: NIFCGlossary: what each term means
Barely moving. Low, thin smoke.
Burning without flame, in the ground or in roots. Can flare up days later.
Moves slowly, hugging the ground.
Spreads with low, steady flames.
Spreading evenly and steadily, with visible flame.
Fast and unpredictable.
Runs along the ground much faster than a person walks.
Grows along the sides, not head-on.
Moves against the wind or downhill, which makes it slower.
Climbs into the treetops and jumps crown to crown. It can't be attacked from the ground.
Climbs into the crowns in bursts and drops back down.
Whole trees flaring up like torches.
Single scattered trees flaring up whole, like torches.
Whole clumps of trees flaring at once.
Wind carries embers through the air and starts new fires ahead of the front: that is how a fire jumps a road or a firebreak.
The wind pushes it in long runs in one direction.
The ones marked ● are the behaviors that make a fire harder to stop. They are not a warning or an instruction: they are the description written by the agency in charge. For decisions, always follow your emergency services.
The story so far
Following a 91-day run that averaged 6,359 acres per day of expansion, the Big Grass Fire in Malheur County, Oregon, has ended. Located 25 miles southwest of Jordan Valley, the natural fire burned across 578,637 acres of federal land managed by the BLM, fueled by short grass standing one foot tall. At the height of the response, 124 personnel managed the incident as a Type 3 Incident.
Fire behavior late in the timeline included minimal fire activity, torching, smoldering, and flanking before the incident reached 100 percent containment and concluded. The operation accumulated a total cost of about $82.2 million (82,200,000 USD). This incident unfolded during the region's typical fire season, which runs from June to October.
Across the country, 3,442,406 hectares have burned so far in 2026, marking a figure that is 37% below the two-decade average.
In context
This wildfire burned in Oregon for 52 days. In total it burned about 578,637 acres — around 2,342 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 3,442,406 hectares have burned so far in 2026 — 37% below the two-decade average. Data from Copernicus GWIS.
Alerts near Jordan Valley
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