The National Weather Service in Portland issued an extreme heat watch Tuesday at 9:16 p.m. that runs from Sunday at 11 a.m. through Monday at 11 p.m., covering Inner Vancouver Metro, East Clark County Lowlands and West Columbia River Gorge on SR 14.
Forecasters warned of high daytime temperatures, with the NWS noting readings between 95 and 100 degrees possible, while regional reporting said some locations could reach triple digits and as high as 105 degrees.
Forecasts cited a progression that may bring 90s starting Saturday, then a greater chance of 100 degrees or hotter on Sunday and Monday across the Willamette Valley and Portland Vancouver metro, according to local reporting.
The NWS also flagged overnight concerns, saying lows could fall only to the low-to-mid 60s Monday and Tuesday mornings, and that there is a 10 to 20 percent chance overnight lows remain above 70 degrees, which would limit overnight relief.
Safety Guidance And Workplace Recommendations
National Weather Service guidance urges people to stay hydrated, seek air-conditioned shelter and avoid sun exposure during the hottest hours, and to check on relatives and neighbors who may be at risk.
David Bishop, a meteorologist with the National Weather Service, advised avoiding outdoor activity during peak heat and suggested visiting air-conditioned public spaces like libraries or malls to cool off.
The NWS warned parents and pet owners never to leave children or animals unattended in hot vehicles, noting interiors can reach lethal temperatures within minutes.
For outdoor workers, the Occupational Safety and Health Administration recommends frequent rest breaks in shaded or air-conditioned areas, and employers should provide opportunities for cooling and recovery during extreme heat events.
People experiencing heat-related symptoms should be moved promptly to a cool, shaded spot, and emergency services should be contacted by calling 911 if conditions worsen, as advised by safety guidance in the reports.
Local messaging also encouraged residents to prepare homes with cooling devices, use sun protection, and schedule strenuous activities for early morning or evening when temperatures are lower.
