Heat advisory issued for Western Washington for Monday and Tuesday, says the NWS

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The NWS Seattle WA released a heat advisory at 11:40 a.m. on Saturday valid from Monday 11 a.m. until Tuesday 11 p.m. The advisory is for Foothills and Valleys of the North Cascades, Foothills and Valleys of Thurston and Lewis Counties, Lowlands of Western Whatcom County, Lowlands of Western Skagit and Northwestern Snohomish counties, Olympia and Southern Puget Sound, Lowlands of Lewis and Southern Thurston counties, Middle Chehalis River Valley, Willapa and Black Hills, Southern Hood Canal, Northern Hood Canal, Port Townsend area, Eastern Strait of Juan de Fuca, Foothills of the Western and Southern Olympic Peninsula and Lower Chehalis River Valley as well as San Juan and Island counties.

"Hot conditions with high temperatures between 85 and 95 degrees expected and low temperatures between 55 and 60 degrees. This will pose a moderate risk of heat-related illness," adds the NWS. "Temperatures will peak on Tuesday with the hottest locations expected to be in the low 90s in the Puget Sound region and mid 90s in areas south of Olympia."

"Heat will significantly increase the risk of heat-related illnesses for those who are sensitive to heat, especially those without effective cooling or adequate hydration," explains the NWS.

This advisory is in effect until Tuesday at 11 p.m.

Ways to stay safe in the heat according to the NWS

• Stay hydrated: Remember to drink plenty of fluids.
• Seek shelter: Stay indoors in an air-conditioned room to keep cool.
• Stay out of the sun, and check up on relatives and neighbors.
• Child and pet safety: Never leave young children and pets unattended in vehicles, especially when car interiors can reach lethal temperatures within minutes.
• Be mindful outdoors: Take extra precautions when working or spending time outside.
• Time your activities wisely: When possible, reschedule strenuous activities to early morning or evening.
• Be alert to warning signs: Educate yourself about the signs and symptoms of heat exhaustion and heat stroke.
• Stay cool with clothing: Wear lightweight and loose-fitting clothing.

For a safer outdoor work environment, follow the Occupational Safety and Health Administration (OSHA)'s guidance by scheduling regular rest breaks in shaded or air-conditioned places. If anyone shows signs of heat illness, promptly move them to a cool, shaded area. In an emergency, call 911.

Source: The National Weather Service

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This story was originally published June 20, 2026 at 11:46 AM.