hazardous" range, the worst category, and visibility was less than 2 miles.
"We're now sussing whether we have some more overhead staff", said Steve Roberts, executive director of the Ministry of Environment's wildfire management branch.
Pregnant women should also take precautions because exposure to smoke can cause lower birth weights, likely leading to long-term problems, she said in an interview.
In its latest update, NWS said: "The coastal areas and Southwest Washington should wake up to clean air tomorrow morning, and the rest of Western Washington will follow shortly behind".
The Shovel Lake fire is considered to be the highest-priority of the more than 560 wildfires burning in B.C.as of Tuesday morning.
City officials canceled Ultimate Sports Camp, Adventure Camp and Mobile Recreation on Monday, along with outdoor athletic events.
"Clearly, we are going to overshoot the budget again this year, which has happened repeatedly", Horgan said, adding both federal and provincial governments must ensure adequate resources are available to safeguard communities.
Smoke from distant wildfires is forcing residents in parts of the province to stay indoors, especially if they have pre-existing conditions such as asthma, and tourism is being affected where skies are hazy.
The deteriorating air quality has prompted Environment Canada to issue yet another advisory.
Hundreds of flights have been grounded at Seattle-Tacoma International Airport due to the poor visibility.