Extreme Heat Warning Issued for Northern California and Portland Area Through Tuesday

An Extreme Heat Warning is in effect from mid-Sunday morning to Tuesday evening across large areas of Northern California, including the Sacramento Valley, Shasta County, and surrounding foothills, and across the Portland, Oregon metro area extending into southwest Washington, including Vancouver and the Columbia River Gorge.

Temperatures in the California warning zone could reach up to 110 °F, with overnight lows remaining in the 70s. In the Oregon and Washington warning area, daytime highs are forecast between 95 °F and 100 °F, with nighttime temperatures in the low-to-mid 60s.

The heat is expected to reach its peak through Sunday and Monday, with a slight cooling trend beginning Tuesday. ” Typical mid-June highs in the Portland area average between 61 °F and 65 °F. The California Office of Environmental Health Hazard Assessment states that long periods of high temperatures are particularly dangerous when nights remain warm.

The National Weather Service recommends staying in air-conditioned or cool indoor spaces during peak afternoon hours, using fans if air conditioning is unavailable, drinking plenty of fluids, and avoiding alcohol or excess caffeine. Additional guidance includes wearing lightweight, loose clothing, keeping windows and doors closed during the day and open overnight, avoiding strenuous outdoor activity during the hottest parts of the day, checking on elderly neighbors, young children, and pets, and never leaving anyone, including pets, in a parked vehicle.

The National Weather Service advises looking out for symptoms of heat-related illness such as heat exhaustion or heat stroke.

The California Department of Public Health states that cooling centers are usually located in libraries, community centers, and town halls. gov states that extreme heat can overwhelm the body’s ability to regulate temperature, leading to heat cramps, heat exhaustion, and heat stroke.