About this data
Methodology
Fires are labeled when they are larger than 500 acres, cause damage to property, or when people are injured or killed as a result of the fire.
Fire Perimeters
Fire perimeters are based on geographic data from the National Interagency Fire Center, updated once an hour. This map displays all current wildfire fire perimeters available through NIFC that have not been 100% contained. Perimeters do not include prescribed or incident complex fires. Perimeters are not available for every incident.
Fire perimeters for incidents before June 18, 2021 are based on infrared and thermal imaging from NASA's MODIS and VIIRS-I products.
The perimeters are intended to provide an idea of the scope and extent of the fires with the most current data possible. They are an approximation and do not include all areas affected by fire, nor do they indicate with certainty an area was affected. Agencies use this data to help identify fires and their hot spots. But because of the distance of the satellites, the nature of the measurements and obfuscation by smoke, the resolution is coarse and not 100 percent accurate.
Hot Spots
Hot spots are locations identified by satellite analysts from the National Oceanic and Atmospheric Administration (NOAA).
The hot spots are an approximation and do not include all areas affected by fire, nor do they indicate with certainty an area was affected. Agencies use this same data to help identify fires and their hot spots. But because of the distance of the satellites, the nature of the measurements and obfuscation by smoke, the resolution is coarse and not 100% accurate.
NOAA's Hazard Mapping System Fire and Smoke Product (HMS) is based on locations of fires and significant smoke plumes detected by meteorological satellites. Hot spots are updated between 5 a.m. and 7 a.m. every 30 minutes, and otherwise as time permits. Hot spots should be considered points with no radius or resolution. The current map may contain hot spots up to 48 hours old.
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Credits
Design and development by Evan Wagstaff. Powered by the Hearst Newspapers DevHub.Originally published on May 31, 2019
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Happy Camp Complex - San Francisco Chronicle
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