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Wildfire smoke contains particles and chemicals more toxic than typical air pollution and has been tied to heart attacks, strokes, pregnancy complications, and longer-term health effects. The smoke can travel thousands of miles and linger for weeks.
koin.comA heat dome spanning 1,500 miles will bring temperatures above 100 degrees to multiple cities on Wednesday. More than 110 million people are under heat alerts as smoke from Canadian wildfires moves into the region.