Heat advisory in place for Southwest Washington for Sunday

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On Friday at 10:37 a.m. a heat advisory was released by the NWS Portland OR valid for Sunday between 8 a.m. and 11 p.m. The advisory is for Cowlitz County Lowlands, North Clark County Lowlands, Inner Vancouver Metro and East Clark County Lowlands.

"Temperatures up to 90 degrees F expected. Significant cooling expected overnight," adds the NWS. "There is around 5% chance of high temperatures of 95 degrees or greater in urban areas around the Portland-Metro area. Overall Moderate HeatRisk with relieving cooling temperatures overnight. Highs will be near record breaking temperatures for this time of year."

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

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

During heat waves, consider the following tips from the NWS

• Stay hydrated: Keep yourself well-hydrated by drinking plenty of fluids.
• Find cool shelter: Stay in an air-conditioned room.
• Look out for others: 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 cautious outdoors: Take extra precautions if you work or spend time outside.
• Find the right time: Consider rescheduling strenuous activities to early morning or evening if possible.
• Familiarize yourself with warning signs: Know the symptoms of heat exhaustion and heat stroke.
• Dress appropriately: Wear lightweight, loose-fitting clothing to stay comfortable.

To minimize risks during outdoor work, the Occupational Safety and Health Administration (OSHA) advises incorporating frequent rest breaks in shaded or air-conditioned areas. If someone experiences heat-related symptoms, promptly relocate them to a cool and shaded spot. In case of an emergency, dial 911.

Source: The National Weather Service

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This story was originally published May 1, 2026 at 10:39 AM.