Forecasters Warn of Dangerous Weekend Temperatures Across Oregon

Salem, Oregon- Oregon is preparing for a dangerous stretch of triple-digit temperatures as forecasters warn of a multi-day heat wave expected to affect much of the state beginning Friday.

The National Weather Service (NWS) has issued an Extreme Heat Watch for large portions of Western Oregon from Friday morning, Aug. 22, through Sunday evening. The watch covers the Central and Southern Willamette Valley, Greater Vancouver Metro, Portland Metro Hills, Inner Portland Metro, Tualatin Valley, Lower Columbia and Cowlitz River Valleys, the West Columbia River Gorge above 500 feet, and the Clackamas County Cascade Foothills.

In Southern Oregon, conditions are expected to be even more severe. The NWS Medford office has issued an Excessive Heat Warning for Jackson, Josephine, and surrounding counties from 1 p.m. Friday through 8 p.m. Monday, Aug. 25. Temperatures in the Rogue Valley are forecast to approach 110 degrees in some locations, with little overnight relief.

Public Health Concerns

State officials say the prolonged heat could put lives at risk. The Oregon Department of Human Services (ODHS) and the Oregon Department of Emergency Management (OEM) are coordinating with counties and cities to provide cooling centers, outreach, and resources for vulnerable residents.

“Extreme heat is one of the most deadly weather threats Oregon faces,” officials warned in a joint statement. “While heat illness is preventable, each year lives are lost when temperatures reach hazardous levels.”

Health experts say infants, children, pregnant individuals, older adults, and those with chronic health conditions face the greatest risks. Outdoor workers, athletes, and residents without access to air conditioning are also particularly vulnerable.

Recognizing Heat Illness

Heat exhaustion symptoms include dizziness, heavy sweating, nausea, vomiting, and muscle cramps. Those experiencing these signs should move to a cooler environment, drink water, and apply cool cloths. Persistent vomiting requires medical care.

Heat stroke, considered a medical emergency, occurs when body temperature exceeds 103°F. Warning signs include hot, red skin, rapid pulse, headache, nausea, confusion, or loss of consciousness. Emergency officials urge residents to call 911 immediately if heat stroke is suspected, and to cool the person with wet cloths or a cool bath until help arrives.

Understanding the Alerts

The National Weather Service issues different levels of advisories depending on severity:

Excessive Heat Warning: Extremely dangerous conditions are occurring or imminent. Residents are urged to avoid outdoor activities, stay indoors with air conditioning, and check on vulnerable neighbors. Extreme Heat Watch: A signal that dangerous heat is possible within one to three days. Residents should prepare to alter outdoor plans and identify nearby cooling resources. Heat Advisory: Temperatures are hot enough to pose health risks but may not reach warning levels. Residents are urged to limit outdoor activity and stay cool.

Cooling Centers and Resources

Cooling centers are being set up in communities across Oregon. Information on cooling shelters, transportation options, and extended hours will be available through 211info, which serves as the state’s central hub for heat-related resources.

Residents can dial 211 or visit 211info.org/summer-and-heat-related-resources for details. Due to the heat wave, the 211info call center will begin extended operations at noon on Friday and remain open 24 hours a day until the heat event ends.

Officials also recommend preventive steps: drink water regularly, avoid alcohol and sugary beverages, wear lightweight clothing, keep windows closed during the day, and open them at night when air quality allows. Above all, authorities stress that children, pets, and vulnerable adults must never be left in parked vehicles.

Wildfire and Energy Risks

The extreme heat also heightens wildfire danger across already dry landscapes in Southern and Eastern Oregon. Fire officials are reminding residents to follow all local burn bans, use caution with outdoor tools and vehicles, and report unsafe fire conditions.

Meanwhile, energy officials expect heavy demand on the power grid as residents rely on air conditioning. Authorities urge conservation by avoiding the use of major appliances during peak morning and evening hours, turning off unnecessary lights, and unplugging electronics.

The Oregon Department of Justice has also reminded consumers to report any instances of price gouging on essential goods or lodging at doj.state.or.us/consumer-protection.

Historical Context: Lessons From Past Heat Waves

The warnings come as Oregon continues to grapple with the memory of past extreme heat events that proved deadly.

In late June 2021, a record-shattering “heat dome” settled over the Pacific Northwest, pushing Portland to 116 degrees, Salem to 117, and multiple Willamette Valley cities into uncharted territory. That event killed at least 96 people in Oregon, according to the Oregon Health Authority, many of whom were elderly residents living without access to air conditioning.

Subsequent years have brought additional heat waves, though less severe. In August 2022, temperatures in Portland topped 102 degrees during a prolonged stretch of high heat, straining cooling centers and prompting widespread calls for power conservation. In July 2023, Medford recorded back-to-back days above 110 degrees, fueling fast-moving grassfires and triggering rolling blackouts in some neighborhoods.

These events have led to changes in how the state and local governments respond. Oregon lawmakers passed new workplace safety rules requiring employers to provide shade, rest breaks, and water for outdoor workers during high-heat conditions. Counties have also invested in more permanent cooling center infrastructure and expanded access to 211 services.

Looking Ahead

This week’s heat wave is expected to be one of the strongest of the summer, with some forecasts suggesting it could rival past August extremes. Temperatures are likely to remain above seasonal averages into early next week, with gradual relief possible after Monday evening.

Officials say awareness and preparation will be critical. They are urging Oregonians to plan ahead, look out for neighbors, and take advantage of available resources to stay safe.

“Heat doesn’t have to be deadly,” emergency officials emphasized. “By taking action, we can protect one another during these dangerous days.”

For the latest forecasts, residents are encouraged to visit weather.gov or follow local emergency management agencies for real-time updates.