"Smoke is severely impacting air quality today", the Spokane Regional Clean Air Agency said in a tweet Sunday morning. Unhealthy air is expected to gradually get better Thursday.
Northwest residents should avoid vacuuming for up to a week as they wait for the wildfire smoke that has again descended over the lowlands to clear. On Tuesday, most parts of the state were considered moderate in terms of air quality, according to the EPA's AirNow site.
Almost all air quality in Washington was listed as unhealthy or worse on Monday, with the Pacific coast the only exception.
Kathy, from Skyway, sent this photo in Monday night, says her auto picked up a dusting of ash.
Multiple area high school sports have reported either cancelling or moving practices indoors.
The Wildfire Service said the smoke in the Kamloops Fire Centre made it hard to see new fires on the weekend and limited its use of aircraft to fight the blazes. "There's going to be smoke".More news: Trump ‘not thrilled’ with Fed chairman over interest rate hikes
The limited visibility has also created delays at Seattle-Tacoma Airport, according to the Federal Aviation Administration, with greater aircraft separation in place.
The hazardous air category ranges from 310 to 500.
The National Weather Service predicts "widespread smoke" will turn to "widespread haze" by Wednesday as onshore winds return.
With a 10+ rating, the province advises the general population to reduce or reschedule strenuous activities outdoors, particularly if you have symptoms such as coughing and throat irritation. Those with heart disease may experience chest pain, irregular heartbeats, shortness of breath and fatigue.
There will be "no significant smoke clearing expected before Wednesday for most of the state". The group of siblings and friends rented an RV and drove in to visit a sister who recently moved to the area.
Dr. Trevor Corneil, chief medical officer for Interior Health, the Okanagan's provincial health-care co-ordinator, said Sunday even professional triathletes could struggle if particulate entered their lungs and bloodstream. "We're from tornado alley, and we don't have wildfires".