Heat advisory affecting Southwest Washington Monday and Tuesday, says the NWS

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On Saturday at 11:25 a.m. a heat advisory was issued by the NWS Portland OR valid from Monday 11 a.m. until Tuesday 11 p.m. The advisory is for Cowlitz County Lowlands, North Clark County Lowlands and South Washington Cascade Foothills.

The NWS informs, "Temperatures up to 93 degrees to 98 expected."

"Hot temperatures may cause heat illnesses," explains the NWS.

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

NWS Heat Wave Safety Tips: Stay safe with these recommendations

• Consume plenty of fluids to stay hydrated.
• Seek shelter: Stay indoors in an air-conditioned room to keep cool.
• Look out for others: Stay out of the sun, and check up on relatives and neighbors.
• Ensure child and pet safety: Take every precaution to never leave young children and pets alone in vehicles, especially in extreme heat when car interiors can quickly become hazardous.
• Take extra precautions outdoors: If you work or spend time outside, be sure to take additional safety measures.
• Optimal Timing: When possible, reschedule strenuous activities to early morning or evening.
• Recognize early indicators: Learn to identify the warning signs of heat exhaustion and heat stroke.
• Dress comfortably: 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 11:30 AM.