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Outside and Vehicle Fire Causes

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Causes of outside fires (2021)

2021 National Fire Protection Association estimate of outside fires: 578,500

39.9%
Unintentional
26.4%
Cause undetermined after investigation
21.8%
Intentional
4.8%
Cause under investigation
3.6%
Act of nature
3.2%
Failure of equipment or heat source
0.3%
Exposure
Unknowns apportioned.

Causes of vehicle fires (2021)

2021 National Fire Protection Association estimate of vehicle fires: 208,500

42.1%
Unintentional
21.6%
Cause undetermined after investigation
19.1%
Failure of equipment or heat source
10.4%
Cause under investigation
4.6%
Intentional
1.9%
Exposure
0.3%
Act of nature
Unknowns apportioned.

See also: Reports on where fires occur