This summer, millions of people across the eastern U.S. woke up one June morning to apocalyptic orange skies and thick, choking wildfire smoke. Over the summer, massive Canadian wildfires blanketed ...

When smoke from California’s deadliest wildfire blew into downtown Sacramento last November, daylight blurred into dusk and the city’s air became among the world’s most polluted. The Camp Fire has ...

NPR's Sacha Pfeiffer talks with Emily Fischer, a professor of atmospheric science at Colorado State University, about the health effects of the smoke from the fires in Oregon and California. A small ...