At least half of the U.S. experienced difficult weather conditions Thursday with the Northeast and the Midwest smothered by Canadian wildfire smoke and the South sweltering in a relentless heat wave.

At least half of the U.S. experienced difficult weather conditions Thursday, with the Northeast and the Midwest smothered by Canadian wildfire smoke and the South sweltering in a relentless heat wave. https://ift.tt/iVqxIQ5