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Causes of outside fires (2020)
2020 National Fire Protection Association estimate of outside fires: 586,000
| 39.2% | Unintentional | |
| 26.3% | Cause undetermined after investigation | |
| 21.9% | Intentional | |
| 5.1% | Cause under investigation | |
| 3.8% | Act of nature | |
| 3.4% | Failure of equipment or heat source | |
| 0.3% | Exposure |
Causes of vehicle fires (2020)
2020 National Fire Protection Association estimate of vehicle fires: 209,500
| 39.8% | Unintentional | |
| 22.1% | Cause undetermined after investigation | |
| 19.0% | Failure of equipment or heat source | |
| 11.1% | Cause under investigation | |
| 5.3% | Intentional | |
| 2.3% | Exposure | |
| 0.3% | Act of nature |
See also: Reports on where fires occur