As some 2 million acres continue to burn in more than 30 wildfires across Oregon, forecasters predict a shift in winds will bring potentially dangerous air quality to the Portland metro area, which is already expected to see near-triple-digit temperatures throughout the week.
Winds blowing from the east Monday will bring smoke and haze from dozens of fires burning east of the Cascades into the upper Willamette Valley, the National Weather Service says. Smoky conditions are expected to persist through the week.
Forecasts for Portland show Air Quality Index readings could reach triple digits by 3 p.m. Monday, a level considered unhealthy for sensitive groups. By Monday evening, readings are expected to reach 167 out of 500.
Air quality is expected to remain in the 150 range through Tuesday and become especially hazardous late Wednesday into Thursday, with readings forecast to climb into the 180s.
High temperatures forecast for the region are expected to keep smoke trapped near the surface throughout the week.
The weather service warns smoky air can cause burning eyes and a runny nose and worsen preexisting heart and lung conditions. Officials advise people to avoid prolonged time outdoors and check door and window seals to ensure smoke does not enter their homes.
A heat advisory remains in effect for the region from Tuesday afternoon through Wednesday night, with high temperatures expected to reach 100 degrees.
Multnomah County has not announced plans to open cooling shelters.
