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.

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.