Canadian wildfire smoke spreads across a third of United States

Smoke from wildfires burning in three Canadian provinces has covered about a third of the United States, forecasters said, but had little effect on air quality except in New England and parts of New York state and the Midwest.

Alerts were issued on Tuesday for parts of Canada and the neighbouring US, warning of the haze, which brought hazardous levels of particulate pollution to Minnesota, stretched from the Dakotas through the Ohio Valley, into the Northeast and as far south as Georgia, according to the National Weather Service’s Weather Prediction Center in College Park, Maryland. It was especially thick in New York and New England.

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