The Sinlahekin wildfire in Okanogan, Washington has burned 155,209 acres and is 53 percent contained as of July 26. Homes in the affected area face direct fire damage risk.
Overview written from official NASA EONET and National Interagency Fire Center/IRWIN data.
- Type
- Wildfires
- Official size
- 155,209 acres
- Containment
- 53%
- Cause
- Undetermined
- Began
- Status
- Ongoing
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Affected area map
The shaded area is the affected-area perimeter reported for this event by NASA EONET (Okanogan, Washington), colored by hazard type. Pan and zoom to explore the map; when more than one observation exists, use the slider below to step through how the reported area changed.
Interactive affected-area map
Okanogan, Washington · ≈ 240 sq mi reported extent · Enable JavaScript to explore the map.
2026-08-24 00:32 UTC · snapshot 31 of 31
View the timeline — how the reported area changed
Official size & containment
Official incident size and containment reported through NIFC / IRWIN, as we observed it. Newest first.
- 155,209 acres +729 53% contained
- 154,480 acres +182 47% contained
- 154,298 acres ±0 47% contained
- 154,298 acres +48 47% contained
- 154,250 acres +72 47% contained
- 154,178 acres ±0 44% contained
- 154,178 acres +335 44% contained
- 153,843 acres +1,161 44% contained
Show 28 earlier observations
- 152,682 acres ±0 44% contained
- 152,682 acres ±0 44% contained
- 152,682 acres +832 42% contained
- 151,850 acres ±0 42% contained
- 151,850 acres −1,071 42% contained
- 152,921 acres +2,680 37% contained
- 150,241 acres +2,526 42% contained
- 147,715 acres +6,304 42% contained
- 141,411 acres +3,800 42% contained
- 137,611 acres +10,671 34% contained
- 126,940 acres +133 28% contained
- 126,807 acres +6,115 26% contained
- 120,692 acres +3,614 20% contained
- 117,078 acres ±0 9% contained
- 117,078 acres +14,144 9% contained
- 102,934 acres +29,140 5% contained
- 73,794 acres +37,526 0% contained
- 36,268 acres ±0 0% contained
- 36,268 acres +9,477 0% contained
- 26,791 acres +15,475 0% contained
- 11,316 acres ±0 0% contained
- 11,316 acres +2,590 0% contained
- 8,726 acres ±0 0% contained
- 8,726 acres +5,736 0% contained
- 2,990 acres +2,047 0% contained
- 943 acres ±0 0% contained
- 943 acres +4 0% contained
- 939 acres 0% contained
Shown as reported by our sources — not an official product. For current advisories and the authoritative map, see NASA EONET ↗.
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Latest updates
Official updates and news coverage for this event, newest first — National Weather Service products, local storm reports, incident updates and press headlines. Official items are verbatim government text; news headlines link out to the original outlet.
- Forecast discussion NWS OTX
Area Forecast Discussion
Highs in the 90s Tuesday and Wednesday with breezy winds and elevated fire weather risk Wednesday into Thursday.
Show full text Hide full text
000 FXUS66 KOTX 240601 AFDOTX
Area Forecast Discussion National Weather Service Spokane WA 1101 PM PDT Sun Aug 23 2026
.KEY MESSAGES... - Warming and drying trend Monday and Tuesday
- Minor to moderate heatrisk Tuesday and Wednesday with highs in the 90s.
- Breezy winds Wednesday into Thursday with elevated fire weather conditions.
&&
.SYNOPSIS... Temperatures warm Monday into Tuesday with afternoon highs in the 90s by Tuesday. The heat begins to break down Wednesday into Thursday with an increasing risk for breezy winds and mountain thunderstorms.
&&
.DISCUSSION... Today and Wednesday: A ridge will build into the region along the Continental Divide while a trough digs in off the coast. A similar pattern will be setting up from this past weekend. The ridge will be in place for a couple of days leading to dry, warm pattern. Highs will climb back into the 90s. Moderate HeatRisk will return for most lowland locations on Tuesday and Wednesday. As the trough begins to press into the region, a weak band of instability will slide through the Lower Idaho Panhandle and bring a less than 10% chance for showers and isolated thunderstorm on Tuesday night.
Late Wednesday and Thursday:…
- News IQAir
Wildfire Map Spotlight: Washington Wildfires
- News KIRO 7 News Seattle
Sinlahekin Fire burns over 152K acres in Okanogan County; containment grows slightly to 44%
- News king5.com
Evacuation levels downgraded for new wildfire burning in Okanogan County
Show 10 earlier updates
- kpq.com News
Containment Over Sinlahekin Fire Drops To 37 %, Now 152 , 000+ Acres
- peninsuladailynews.com News
Peninsula agencies deploy resources to Eastern Washington fires
- NewsRadio 560 KPQ News
Burning Tree Falls Across Break Line, Causing Containment Over Sinlahekin Fire To Shrink, Now At 37%
- omakchronicle.com News
- omakchronicle.com News
- krem.com News
Sinlahekin Fire remains Washington's second-largest wildfire at more than 117,000 acres
- NewsRadio 560 KPQ News
Sinlahekin Fire Eclipses 100,000 Acres, Now 5% Contained As More Structures Assumed Lost
- NewsRadio 560 KPQ News
- InciWeb Incident update
- InciWeb Incident update
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NASA EONET ↗.