Sisi Fire

Chelan County, Washington · Wildfire

Active Official numbers updated Sep 28, 2026 (about 8 hours ago)

First reported about 7 weeks ago

Metric	Last report	Now	Change
Size	4,305 acres Sep 27, 6:00 PM	4,325 acres Sep 29, 2:00 AM +20 acres was 4,305 acres · Sep 27, 6:00 PM	+20 acres in 1 day
Containment	5% Sep 17, 5:00 PM	15% Sep 29, 2:00 AM +10 percent was 5% · Sep 17, 5:00 PM	+10 percent in 11 days
Crew size	61 Sep 28, 6:00 PM	62 Sep 29, 2:00 AM +1 was 61 · Sep 28, 6:00 PM	+1 in about 8 hours
Money spent	$7.6M Sep 28, 6:00 PM	$7.9M Sep 29, 2:00 AM +$345,022 was $7.6M · Sep 28, 6:00 PM	+$345,022 in about 8 hours

Sisi Fire summary

The Sisi Fire is a wildfire near Chelan County, Washington. It has burned about 4,325 acres (about 3,000 football fields). Crews have boxed in 15% of its edge; the other 85% isn't contained yet. It was first reported about 7 weeks ago. About 62 people are on it, run by a Complex Incident Management Team. We're also tracking 8 other active fires within about 75 miles.

Size: 4,325 acres
Containment: 15%
Discovered: August 14, 2026 (first reported about 7 weeks ago)
Cause: Not reported

The size and containment above are current as of Tuesday, September 29th at 2:00 a.m. CDT.

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Weather & fire-spread conditions

No Red Flag Warning. The National Weather Service hasn't flagged this area for dangerous fire-spread conditions 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
Overnight	—	43°F · Rain Showers Wind 12 to 22 mph W · 96% rain Wind: Windy Heat: Cool Rain likely
Tuesday	47°F · Rain Showers Wind 6 to 12 mph W · 98% rain Wind: Breezy Heat: Cool Rain likely	37°F · Rain Showers Likely then Partly Cloudy Wind 6 to 14 mph W · 73% rain Wind: Breezy Heat: Cool Rain likely
Wednesday	51°F · Mostly Sunny Wind 6 mph W · 2% rain Wind: Calm Heat: Cool Dry	41°F · Slight Chance Rain Showers then Chance Rain And Snow Showers Wind 5 mph W · 30% rain Wind: Calm Heat: Cool Some rain

Forecast from the National Weather Service (weather.gov), pulled Tuesday, September 29th at 2:02 a.m. CDT.

Could this fire move fast?

Weather isn't the only thing that changes how a fire moves. The ground matters too: how steep it is, and what's growing on it. These four numbers are for the exact spot where this fire started, not the whole fire. A big fire crosses a lot of different ground.

47° slope

Fire usually moves faster uphill than downhill. Heat and flame lean uphill, drying out the ground above the fire before it gets there.

Trees with brush underneath (TU5)

Heavy forest litter with shrubs or small trees underneath, in a dry climate. Fire moves at a moderate pace, with medium-height flames.

45% tree canopy cover

The more tree cover above a fire, the easier it is for the fire to climb from the ground into the treetops. That's called a crown fire. Crown fires move faster, throw embers farther ahead of the fire, and are harder for crews to stop head-on.

4,155 ft elevation

Elevation by itself doesn't make a fire more or less dangerous. But it shapes the other three numbers here: what grows there, how dry things get, and what the weather does.

Elevation and slope from the USGS 3D Elevation Program; fuel type and canopy cover from LANDFIRE (USGS and U.S. Forest Service), pulled Thursday, September 10th at 3:51 p.m. CDT.

Who's on it

About 62 people are assigned to this fire, run by a Complex Incident Management Team. The government rates it a Type 1 Incident (the highest complexity level). About $8 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:

→ Watch Duty: real-time fire reporting and evacuations.
→ InciWeb: the government's official fire information site.

Nearby fires to Sisi Fire

Within about 75 miles we're tracking 8 other active fires, closest first:

See all active fires in Washington →

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