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On May 4, 2016, the the Enhanced Thematic Mapper Plus (ETM+) on the Landsat 7 satellite acquired this false-color image of the wildfire that burned through Fort McMurray in Alberta, Canada. The image combines shortwave infrared, near infrared, and green light (bands 5-4-2). Near- and short-wave infrared help penetrate clouds and smoke to reveal the hot spots associated with active fires, which appear red. Smoke appears white and burned areas appear brown.
NASA Earth Observatory image by Joshua Stevens, using Landsat data from the U.S. Geological Survey. Caption by Kathryn Hansen.