What are the causes of wildfires?
Four out of five (80%) wildfires are caused by human activity. This includes both carelessness and arson. The other 20% of wildfires are due to natural causes, such as lightning or volcanic activity. Climate conditions such as drought or heat waves make vegetation drier and more susceptible to wildfires.
Contributing sources: FEMA, U.S. Forest Service
Poll
MegaCities: Top 10 Most At-Risk Cities
1. | Tokyo | 68 |
2. | Los Angeles | 25 |
3. | Manila | 18 |
4. | Bandung | 17 |
5. | Santiago | 16 |
6. | Nagoya | 9.4 |
7. | Osaka | 9.4 |
8. | Jakarta | 9 |
9. | Lima | 8 |
10. | Chengdu | 7.5 |