The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this image on 15 September 2012. Red outlines indicate hot spots where MODIS detected unusually warm surface temperatures associated with fires. NASA image courtesy Jeff Schmaltz, LANCE MODIS Rapid Response Team at NASA GSFC

Caption by Adam Voiland
19 September 2012 Wildfires have burned throughout the western United States for months. Major blazes first emerged in New Mexico in May, then began to turn up in Colorado and Idaho in large numbers. Most recently, fires have surged in California and Washington. […] The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured this image on 15 September 2012. Red outlines indicate hot spots where MODIS detected unusually warm surface temperatures associated with fires. The light spots within the smoke plume are the tops of pyrocumulus clouds, towering clouds provoked by the fire and rising above the smoke layer. Such clouds form when intense heat from a fire pushes air high into the atmosphere. Pyrocumulus clouds sometimes generate intense thunderstorms that can either dampen the flames with drenching rains or propel the fire with strong winds. The 2012 wildfire season will likely break the United States record for the most acres burned, set in 2006 when more than 9.8 million acres burned. (The National Interagency Fire Center has been keeping records since 1960.) Fire had burned nearly 8.4 million acres (3.4 million hectares) across the United States as of September 18, 2012—an area larger than the state of Maryland. Idaho, Oregon, and Montana were hardest hit. Idaho alone accounted for 18 percent of the land burned across the United States in 2012; Oregon accounted for 15 percent, and Montana 11 percent. The size and frequency of wildfires has increased significantly in the western United States over the past few decades due largely to climate change and changing forestry practices. Climate change has decreased winter snow cover, hastened the arrival of spring, and intensified heat waves across much of the West—all factors that exacerbate wildfires. In addition, decades of aggressive fire suppression have left denser forests and abundant fuel on the ground, which makes fires more difficult to control. […]

2012 wildfire season will likely break the United States record