No longer in the daily fire updates. The Mm115 Hwy 20 Fire last appeared in an official report on August 13, 2026, at 5,139 acres and 90% contained. Fires drop off this list once crews have them contained or out; we keep the page for reference. See fires burning now →

Mm115 Hwy 20 Fire

Elmore County, Idaho · Wildfire

No longer active Official numbers updated Aug 13, 2026 (about 1 month ago)
First reported about 7 weeks ago
Metric Now
Size
5,139 acres
Sep 22, 4:00 AM
+203 acres
was 4,936 acres · Aug 11, 4:00 PM
Containment
90%
Sep 22, 4:00 AM
+40 percent
was 50% · Aug 12, 7:00 PM
Crew size
252
Sep 22, 4:00 AM
−16
was 268 · Aug 12, 7:00 PM
Money spent
$4.5M
Sep 22, 4:00 AM
+$500,000
was $4.0M · Aug 12, 7:00 PM

Mm115 Hwy 20 Fire and other nearby fires

🔥 Where this fire started Mostly contained Partly contained Containment not reported

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Mm115 Hwy 20 Fire summary

The Mm115 Hwy 20 Fire is a wildfire near Elmore County, Idaho. It has burned about 5,139 acres (about 4,000 football fields). Crews have boxed in 90% of its edge; the other 10% isn't contained yet. It was first reported about 7 weeks ago. About 252 people are on it, run by a Type 3 IC.

Size
5,139 acres
Containment
90%
Discovered
August 7, 2026 (first reported about 7 weeks ago)
Cause
Not reported

The size and containment above are current as of Wednesday, August 12th at 9:01 p.m. CDT.

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Weather & fire-spread conditions

⚠️ Red Flag Warning in effect. The National Weather Service has flagged conditions here — usually wind plus dry air — that can make fires spread fast. This is the official warning that fire danger is high right now.

Hot, dry, and windy weather can help a fire grow; cool, calm, or wet weather helps crews. The tags below rate each day for fire spread — green is calm, red can push a fire.

A general fire-weather guide (wind matters most, then how dry it is, then heat), not a prediction of what a specific fire will do.

Day Night
Tonight —
61°F · Patchy Smoke
Wind 3 to 8 mph ENE · 0% rain
Wind: Calm Heat: Cool Dry
Thursday
77°F · Patchy Smoke
Wind 5 to 13 mph S · 10% rain
Wind: Breezy Heat: Warm Dry
57°F · Patchy Smoke
Wind 6 to 9 mph SE · 39% rain
Wind: Calm Heat: Cool Some rain
Friday
76°F · Chance Showers And Thunderstorms
Wind 8 mph SSE · 44% rain
Wind: Calm Heat: Warm Some rain
56°F · Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
Wind 3 to 7 mph ENE · 25% rain
Wind: Calm Heat: Cool Some rain

Forecast from the National Weather Service (weather.gov), pulled Wednesday, August 12th at 9:05 p.m. CDT.

Who's on it

About 252 people are assigned to this fire, run by a Type 3 IC. The government rates it a Type 4 Incident. About $5 million has been spent on it so far.

The official feed reports the total headcount, not a breakdown by crew type.

Where to get live updates

We show the daily official picture. For minute-by-minute updates, evacuation orders, and maps, these do it best:

Nearby fires to Mm115 Hwy 20 Fire

No other active fires are near this one right now. It's on its own.

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