New York Times – California, Oregon and Washington Fire and Air Quality Maps

California, Oregon and Washington are enduring a wildfire season of historic proportions. More than two dozen people have died since early September, when powerful winds helped spark fires and propel existing ones, leaving millions of acres charred and thousands of structures destroyed. See the live coverage here.

Featured photo: The remains of a home were surrounded by smoke after it was destroyed by the Bear Fire in Berry Creek, Calif. Photo by Christian Monterrosa for The New York Times.

Left photo: Sensor data from PurpleAir. Readings have been adjusted to better account for the properties of wood smoke. The levels on the map are based on the air quality index, a measure of how clean or unhealthy the air is.