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CriticalActive

Sisi

Chelan, WA · Natural

An active fire at 15% containment. Conditions can change quickly. Check closures before traveling to nearby public lands.

0%Critical

4,275

Acres Burned

42

Days Burning

Aug 14, 2026

Discovered

21h ago

Last Update

Growth

Grew 282 acres in the last day
Aug 14 / 1 acresSep 25 / 4,275 acres

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Threatened Public Lands

12 public land units within 75 miles

Lake Chelan National Recreation Area

Avoid

Recreation Area / WA

6.7 mi

E

Glacier Peak Wilderness

Avoid

Wilderness / WA

13.3 mi

SW

Lake Chelan-Sawtooth Wilderness

Avoid

Wilderness / WA

16.1 mi

E

Stephen Mather Wilderness Area

Avoid

Wilderness / WA

27.8 mi

NW

Okanogan National Forest

Check first

National Forest / WA

29.2 mi

NE

Golden Phoenix Purchase Unit

Avoid

National Forest / WA

30.2 mi

NW

Illabot Creek Purchase Unit

Check first

National Forest / WA

30.3 mi

W

North Cascades National ParkClosures in effect

Closed

National Park / WA

30.5 mi

NW

Mt. Baker National Forest

Check first

National Forest / WA

31.7 mi

W

Ross Lake National Recreation Area

Avoid

Recreation Area / WA

32.6 mi

N

Henry M. Jackson Wilderness

Check first

Wilderness / WA

34.2 mi

SW

Skagit Purchase Unit

Check first

National Forest / WA

34.9 mi

W

Official Park Alerts

Closures and dangers published by the National Park Service

Danger / North Cascades National Park

Smoke from Wildfires May Affect Air Quality

Smoke from wildfires is to be expected with active fires across the region.Take precautions when recreating outdoors when heavy smoke is present.

Official notice

Park Closure / North Cascades National Park

Campfire Ban in All Portions of the Park Complex Begins June 29

Effective Monday, June 29, campfires or the ignition of wood, briquettes, or any fuel in fire pits, fire pans, and barbeque grills, are banned in all portions of North Cascades National Park Service Complex, which includes North Cascades Na...

Official notice

Park Closure / North Cascades National Park

Hozomeen Gate Remains Closed

Until further notice, the gate at Hozomeen will remain closed; vehicle and foot traffic across the US/Canada border is prohibited. Visitors must enter through a designated port of entry.

Official notice

Situation Updates

Posted by the incident management team on InciWeb, plus changes read from NIFC interagency perimeter data

Incendio Little Giant Actualización diaria 09-25-2026

Incident team
Sep 25

Incendio Sisi—Tamaño: 4,305 acres | Inicio: 14 de agosto de 2026 | Causa: Rayos | Contención: 15% Incendio Little Giant—Tamaño: 172,889 acres | Inicio: 15 de julio de 2026 | Causa: Rayos | Contención: 81% Recursos: 18 vehículos; 6 cuadrillas; 34 equipo pesado; 13 camiones cisterna; 5 helicópteros; 846 personal INCENDIO SISI: El incendio Sisi se mantuvo activo durante los últimos turnos operativos,...

InciWeb

Little Giant and Sisi Fires Daily Update 09-25-2026

Incident team
Sep 25

Sisi Fire—Size: 4,305 acres | Start Date: August 14, 2026 | Cause: Lightning | Containment: 15% Little Giant Fire—Size: 172,889 acres | Start Date: July 15, 2026 | Cause: Lightning | Containment: 81% Total Resources: 18 engines; 6 crews; 34 heavy equipment; 13 water tenders; 5 helicopters; 846 personnel SISI FIRE: The Sisi Fire was active over the last few operational shifts, growing at a rate of ...

InciWeb

SISI update: 4,275 acres, 15% contained

Perimeter data
Sep 25

Per interagency perimeter data, the SISI grew 117 acres to 4,275.

IRWIN

Incendio Little Giant/Sisi Actualización diaria 09-24-2026

Incident team
Sep 24

Datos Rápidos Incendio Sisi—Tamaño: 4,275 acres | Inicio: 14 de agosto de 2026 | Causa: Rayos | Contención: 15% Incendio Little Giant—Tamaño: 172,879 acres | Inicio: 15 de julio de 2026 | Causa: Rayos | Contención: 81% Recursos: 21 vehículos; 5 cuadrillas; 27 equipo pesado; 10 camiones cisterna; 5 helicópteros; 796 personal INCENDIO SISI: Los bomberos localizaron y extinguieron de inmediato tres f...

InciWeb

Little Giant and Sisi Fires Daily Update 09-24-2026

Incident team
Sep 24

Sisi Fire—Size: 4,275 acres | Start Date: August 14, 2026 | Cause: Lightning | Containment: 15% Little Giant Fire—Size: 172,879 acres | Start Date: July 15, 2026 | Cause: Lightning | Containment: 81% Total Resources: 21 engines; 5 crews; 27 heavy equipment; 10 water tenders; 5 helicopters; 796 personnel SISI FIRE: Firefighters successfully located and immediately extinguished three plate-sized spo...

InciWeb

SISI update: 4,158 acres, 15% contained

Perimeter data
Sep 24

Per interagency perimeter data, the SISI grew 165 acres to 4,158.

IRWIN

Incendio Little Giant/Sisi Actualización diaria 09-23-2026

Incident team
Sep 23

Datos Rápidos Incendio Sisi—Tamaño: 4,158 acres | Inicio: 14 de agosto de 2026 | Causa: Rayos | Contención: 15% Incendio Little Giant—Tamaño: 172,850 acres | Inicio: 15 de julio de 2026 | Causa: Rayos | Contención: 81% Recursos: 20 vehículos; 6 cuadrillas; 28 equipos pesados; 13 camiones cisterna; 5 helicópteros; 818 personal INCENDIO SISI: El personal de extinción continuó con las labores de cont...

InciWeb

Little Giant and Sisi Fires Daily Update 09-23-2026

Incident team
Sep 23

Sisi Fire—Size: 4,158 acres | Start Date: August 14, 2026 | Cause: Lightning | Containment: 15% Little Giant Fire—Size: 172,850 acres | Start Date: July 15, 2026 | Cause: Lightning | Containment: 81% Total Resources: 20 engines; 6 crews; 28 heavy equipment; 13 water tenders; 5 helicopters; 818 personnel SISI FIRE: Fire personnel continued suppression and control efforts throughout Tuesday as fire ...

InciWeb

SISI update: 3,993 acres, 15% contained

Perimeter data
Sep 23

Per interagency perimeter data, the SISI grew 85 acres to 3,993.

IRWIN

Incendio Little Giant/Sisi Actualización diaria 09-22-2026

Incident team
Sep 22

Datos Rápidos Incendio Sisi—Tamaño 3,993 acres | Inicio: 14 de agosto de 2026 | Causa: Rayos | Contención: 15% Inceido Little Giant—Tamaño: 172,850 acres | Inicio: July 15, 2026 | Causa: Rayos | Contención: 81% Recursos: 21 vehículos; 7 cuadrillas; 29 equipo pesado; 11 camiones cisterna; 5 helicópteros; 879 personal INCENDIO SISI: Los objetivos de control del incendio permanecen claramente definid...

InciWeb

Little Giant and Sisi Fires Daily Update 09-22-2026

Incident team
Sep 22

Quick Facts Sisi Fire—Size: 3,993 acres | Start Date: August 14, 2026 | Cause: Lightning | Containment: 15% Little Giant Fire—Size: 172,850 acres | Start Date: July 15, 2026 | Cause: Lightning | Containment: 81% Total Resources: 21 engines; 7 crews; 29 heavy equipment; 11 water tenders; 5 helicopters; 879 personnel SISI FIRE: Control objectives for the incident remain clearly defined: to keep the ...

InciWeb

SISI update: 3,908 acres, 15% contained

Perimeter data
Sep 22

Per interagency perimeter data, the SISI grew 177 acres to 3,908.

IRWIN

Incendio Little Giant/Sisi Actualización diaria 09-21-2026

Incident team
Sep 21

Datos Rápidos Incendio Sisi—Tamaño: 3,908 acres | Inicio: 14 de agosto de 2026 | Causa: Rayos | Contención: 15% Incendio Little Giant—Tamaño: 172,836 acres | Inicio: 15 de julio de 2026 | Causa: Rayos | Contención: 81% Recursos: 22 vehículos; 7 cuadrillas; 25 equipos pesados; 11 camiones cisterna; 5 helicópteros; 847 personal INCENDIO SISI: Ayer, los recursos aéreos descargaron aproximadamente 100...

InciWeb

Little Giant and Sisi Fires Daily Update 09-21-2026

Incident team
Sep 21

Quick Facts Sisi Fire—Size: 3,908 acres | Start Date: August 14, 2026 | Cause: Lightning | Containment: 15% Little Giant Fire—Size: 172,836 acres | Start Date: July 15, 2026 | Cause: Lightning | Containment: 81% Total Resources: 22 engines; 7 crews; 25 heavy equipment; 11 water tenders; 5 helicopters; 847 personnel SISI FIRE: Aviation resources delivered approximately 100,000 gallons of water on t...

InciWeb

Incendio Little Giant/Sisi Actualización diaria 09-20-2026

Incident team
Sep 20

Datos Rápidos Incendio Sisi—Tamaño 3,838 acres | Inicio: 14 de agosto de 2026 | Causa: Rayos | Contención: 15% Incendio Little Giant—Tamaño: 172,829 acres | Inicio: 15 de julio de 2026 | Causa: Rayos | Contención: 81% Recursos: 23 maquinarias; 7 cuadrillas; 30 equipos pesados; 10 camiones cisterna; 5 helicópteros; 847 personal INCENDIO SISI: El sábado, los helicópteros realizaron descargas estraté...

InciWeb

Timeline

Aug 14Now

42 days since discovery

Other Fires in WA

5 additional active fires

Little Giant

Chelan, WA

173K acres

81%

Sinlahekin

Okanogan, WA

166K acres

93%

Ptarmigan

Okanogan, WA

25K acres

73%

Three Queens

Kittitas, WA

9.6K acres

31%

Border 2

Whatcom, WA

9.1K acres

75%

Data Sources

Fire data from NIFC Wildland Fire Interagency Geospatial Services (WFIGS) via IRWIN. Satellite hotspots from NASA FIRMS VIIRS. Situation updates are either posted by the incident management team on InciWeb or read by us from WFIGS perimeter data, and each one says which. Air quality data from EPA AirNow. Public lands boundaries from USGS PAD-US 4.0.

IRWIN ID: dc4342d9-b479-44f1-906c-8abd42e1f59c

Important

More Than Just Parks aggregates third-party data from EPA AirNow, NOAA, NASA FIRMS, and NIFC/WFIGS. Readings can be delayed, estimated, incomplete, or wrong, and conditions on the ground change quickly. This tool is for general information only and is not a substitute for official air quality alerts, fire and evacuation orders, land manager closures, or emergency services. Verify with the managing agency and local authorities before making any travel, health, or safety decision. We make no warranty as to accuracy and accept no liability for decisions made using this information. This is not an emergency or evacuation tool. If you are near a fire, follow official evacuation orders and call 911. Terms of Service.