Smoke from wildfires swept the U.S.

Federal authorities reported on July 20 that wildfires, mainly in the western United States, have burned approximately 1.29 million acres (2,021 square miles) of land in 13 states, and smog spread across the country. Although fires like Bootleg Fire in Oregon are thousands of miles from the East Coast, residents of New York City woke up on Tuesday to see a hazy sky that officials said was caused by wildfire smoke. This visualization, released by the National Weather Service on the evening of July 19, shows the predicted path of smog across the continental United States and parts of southern Canada. The National Weather Service wrote in a tweet: “Smog from the western U.S. and Canada is causing reduced visibility in the northern half of the country, including western New York and north-central New York.” “The smog before the cold front pushes the smog to the east. Will last until Wednesday morning.” Credit: National Weather Service via Storyful