On average, the annual number of fires that burn more than 1,000 acres in the western US has more than tripled between the 1970s and the 2010s.
Source: Climate Central
California's Mendocino fire covered a total area nearly 10 times the size of San Francisco.
The Mendocino Complex fire, which broke out in July 2018, is the largest on record in California. It burned an area stretching more than 450,000 acres.
The US Forest Service spends 12 times as much money suppressing wildfires as it did in 1985.
Last year's wildfires cost the US Forest Service nearly $3 billion.
The number of US homes at risk of wildfires has gone up dramatically, from 30.8 million in 1990 to 43.4 million in 2010.
In California, more than 11.2 million people live in areas with elevated risk of wildfire exposure.
Since the 1970s, the average temperatures in spring and summer have gone up by 1.8 degrees Fahrenheit (1 degree Celsius) in California.
Higher temperatures have been linked to more frequent and severe wildfires.
Fire season in the western US is now 105 days longer than it was in the 1970s.
The average wildfire season now lasts at least 2.5 months longer than it did in the early 1970s.
Annual financial losses due to wildfires now range from $63.5 billion to $285 billion.
In 2016, up to $285 billion in economic losses were caused by fire-related deaths, evacuations, and declining property values.
By 2050, California will have 24 more days each year with high risk for wildfires.
In 2000, there were 120 days with high risk for wildfires in California.
As many as 11 states could see a 500% increase in the amount of land burned annually by 2039, according to a recent study.
The same study suggests that California could see a 10% to 150% increase in the amount of land burned in the next two decades.
