Pictured: The LNU Lightning Complex which burned across wine country in August 2020. In early September 2020, a combination of a record-breaking heat wave, and Diablo and Santa Ana winds sparked more fires and explosively grew the active fires, with the August Complex more than doubling the Mendocino Complex's size to become California's largest recorded wildfire. On August 19, 2020, California Governor Gavin Newsom reported that the state was battling 367 known fires, many sparked by intense thunderstorms on August 16–17. The fire crossed seven counties and has been described as being larger than the state of Rhode Island. California's August Complex fire has been described as the first "gigafire" as the area burned exceeded 1 million acres. As of the end of the year, nearly 10,000 fires had burned over 4.2 million acres, more than 4% of the state's roughly 100 million acres of land, making 2020 the largest wildfire season recorded in California's modern history. This map was created by Liz Anderson, Emily Zentner, Veronika Nagy, Chris Hagan, Renee Thompson, Katy Kidwell and Helga Salinas.The 2020 California wildfire year was characterized by record-setting wildfires that burned across the state of California as measured during the modern era of wildfire management and record keeping. Fire namesĬapRadio changed the names of three fires on this map that included a racial slur in accordance with Associated Press guidelines and our own standards. Fires may be missing altogether or have missing or incorrect attribute data. As of September 2020, Cal Fire had found that the dataset is missing 483 notable fires and is looking to find and add these. However, the data is by nature incomplete and duplicates may exist. Ten acres is the federal minimum for reporting.Ĭal Fire says that this dataset - which runs from 1878 to 2020 as of April 2021 and is updated annually - is one of the most complete datasets of California’s fires through history. Cal Fire’s data includes timber fires that burned more than 10 acres, brush fires that burned more than 50 acres and grass fires that burned more than 300 acres, so some smaller fires may not be shown here. Some fires may be missing because historical records were lost or damaged, were too small for the minimum cutoffs, had inadequate documentation or have not yet been incorporated into the database. This means that the causes shown for some fires may be out of date. Cal Fire enters the cause of each year’s fires when this data is captured annually and does not update them if investigations are later completed or determinations are changed. Fire causesĪlso displayed here are the reported cause and acres of each fire shown. These fires are also categorized by the meteorological season in which they started, which are as follows: Winter (December - February), Spring (March - May), Summer (June - August) and Fall (September - November). 2020 is also shown separately because there has been only one recorded fire year so far in the 2020s decade in this dataset. Fires that started between 18 are shown separately here due to more inconsistencies in data for earlier fires. 77 fires that did not include a year in the data have been left out. These wildfires are categorized by the decade or time period in which they started. This map and data is not intended to be used for legal purposes or statistical analysis. Forest Service, the Bureau of Land Management and the U.S. During fire season, the fire situation map will show active large fires ODF is tracking in the state and the locations of. This map shows the perimeters of more than 20,000 wildfires that have been recorded in California from 1878 to 2020 using data from Cal Fire, the National Parks Service, the U.S.
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