Officials are asking people to stay indoors and use air purifiers as smoke from Canadian wildfires prompts red flag air quality warnings in the Northeast.

RELATED: Air pollution impacts some Americans more than others. Here’s why. t.ly/hU–A

Canada is on fire. On Tuesday there were more than 400 wildfires burning across the country, 238 of them out-of-control. Smoke and unhealthy air quality levels from the conflagration have blanketed multiple Canadian provinces, much of the Great Lakes region and parts of the northeastern United States.

While forest fires are a natural part of the ecosystem of Canada’s boreal forests, the size, ferocity and number of fires this year is decidedly abnormal. Most of the country is expected to be under high to extreme risk for much of the wildfire season, which stretches from May to September.

“Climate change is real and having a huge impact on Canadians right now with forest fires burning across the country,” tweeted Catherine McKenna, Canada’s former climate minister.

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