Idaho, Washington Moderate Heat Advisory | Effective 07/20/2026 21:21

Headline: 
Heat Advisory issued July 20 at 9:21PM PDT until July 23 at 9:00PM PDT by NWS Spokane WA
Event: 
Heat Advisory
Urgency: 
Expected
Effective: 
July 20, 2026 - 9:21pm
Expires: 
July 21, 2026 - 12:00pm
Description: 
* WHAT...Hot temperatures with daytime highs in the mid 90s to near 100 degrees Tuesday and upper 90s to low 100s Wednesday and Thursday. This will pose a moderate to major risk of heat-related illness. * WHERE...Portions of North and North Central Idaho and Central, East Central, North Central, Northeast, and Southeast Washington. * WHEN...From 11 AM Tuesday to 9 PM PDT Thursday. * IMPACTS...Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Wednesday will likely be the hottest day with widespread moderate and major HeatRisk. Moderate and locally major HeatRisk continue into Thursday. Limited overnight relief expected across the lower elevations Wednesday and Thursday mornings with low temperatures in the mid 60s to mid 70s. Smoke from area wildfires may end up affecting how hot high temperatures get.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Area Description: 
Northern Panhandle; Coeur d'Alene Area; Lewiston Area; Lewis and Southern Nez Perce Counties; Northeast Blue Mountains; Lower Garfield and Asotin Counties; Washington Palouse; Moses Lake Area; Upper Columbia Basin; Spokane Area; Northeast Mountains; Okanogan Highlands; Wenatchee Area; Okanogan Valley; Waterville Plateau; Central Chelan County; Western Chelan County; Western Okanogan County
Forcast Office: 
NWS Spokane WA