Heat advisory affecting Puget Sound region from Sunday to Tuesday

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A heat advisory was released by the NWS Seattle WA on Thursday at 12:38 p.m. valid from Sunday 11 a.m. until Tuesday 5 a.m. The advisory is for Lowlands of Western Whatcom County, Lowlands of Western Skagit and Northwestern Snohomish counties, Downtown Everett / Marysville Area, Shoreline / Lynnwood / South Everett area, Southern Hood Canal, Northern Hood Canal, Eastern Kitsap County, Port Townsend area and Eastern Strait of Juan de Fuca.

"Hot conditions with high temperatures up to 85 degrees to 90 degrees and low temperatures down to 60 degrees expected. This will pose a moderate risk of heat-related illness," says the NWS. "The warmest daytime high temperatures are expected Monday afternoon and the warmest overnight lows are expected Monday night into Tuesday morning."

"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," comments the NWS.

This advisory is in effect until Tuesday at 5 a.m.

Protect yourself during a heat wave with these tips from the NWS

• Stay hydrated: Make sure to drink plenty of fluids.
• Stay in an air-conditioned room.
• Look out for others: Stay out of the sun, and check up on relatives and neighbors.
• Protect your little ones and furry friends: Never leave young children and pets alone in vehicles, especially during hot weather when car interiors can become dangerously hot in a matter of minutes.
• Take extra precautions outdoors: If you work or spend time outside, be sure to take additional safety measures.
• Time your activities wisely: If possible, reschedule strenuous activities to early morning or evening when the heat is less intense.
• Recognize early indicators: Learn to identify the warning signs of heat exhaustion and heat stroke.
• Stay cool with clothing: Select lightweight and loose-fitting outfits for enhanced comfort.

To reduce risk during outdoor work, the Occupational Safety and Health Administration (OSHA) recommends scheduling frequent rest breaks in shaded or air-conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. In an emergency, call 911.

Source: The National Weather Service

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This story was originally published June 11, 2026 at 12:40 PM.