Throughout May, more than 140 wildfires have burned across Alberta and British Columbia. On Sunday, the thick, ashy haze billowing from these infernos drifted across the U.S. border, casting a blanket of smoke over Minnesota and Wisconsin, which eventually made its way to Iowa and other parts of the Midwest earlier Tuesday morning.  Counties throughout … Continue reading Canadian Wildfire Smoke Is Triggering Outdoor Air Quality Alerts Across the Midwestern U.S. It Could Pollute the Indoors, Too