| Disaster Type | Events | Events/Year | Percent Frequency | Total Costs | Percent of Total Costs | Cost/Event | Cost/Year | Deaths | Deaths/Year |
|---|---|---|---|---|---|---|---|---|---|
| Drought | 32 | 0.7 | 7.9% | $367.5B CI | 12.6% | $11.5B | $8.2B | 4,658† | 104† |
| Flooding | 45 | 1.0 | 11.2% | $203.0B CI | 7.0% | $4.5B | $4.5B | 742 | 16 |
| Freeze | 9 | 0.2 | 2.2% | $37.4B CI | 1.3% | $4.2B | $0.8B | 162 | 4 |
| Severe Storm | 203 | 4.5 | 50.4% | $514.3B CI | 17.6% | $2.5B | $11.4B | 2,145 | 48 |
| Tropical Cyclone | 67 | 1.5 | 16.6% | $1,543.2B CI | 52.9% | $23.0B | $34.3B | 7,211 | 160 |
| Wildfire | 23 | 0.5 | 5.7% | $147.9B CI | 5.1% | $6.4B | $3.3B | 537 | 12 |
| Winter Storm | 24 | 0.5 | 6.0% | $104.2B CI | 3.6% | $4.3B | $2.3B | 1,463 | 33 |
| All Disasters | 403 | 9.0 | 100.0% | $2,917.5B CI | 100.0% | $7.2B | $64.8B | 16,918 | 376 |
| Drought | 32 | 0.7 | 9.2% | $214.5B CI | 10.6% | $6.7B | $4.8B | 4,658† | 104† |
| Flooding | 38 | 0.8 | 11.0% | $119.5B CI | 5.9% | $3.1B | $2.7B | 666 | 15 |
| Freeze | 8 | 0.2 | 2.3% | $15.5B CI | 0.8% | $1.9B | $0.3B | 162 | 4 |
| Severe Storm | 168 | 3.7 | 48.6% | $365.4B CI | 18.1% | $2.2B | $8.1B | 1,768 | 39 |
| Tropical Cyclone | 62 | 1.4 | 17.9% | $1,128.9B CI | 55.9% | $18.2B | $25.1B | 7,168 | 159 |
| Wildfire | 21 | 0.5 | 6.1% | $110.1B CI | 5.5% | $5.2B | $2.4B | 520 | 12 |
| Winter Storm | 17 | 0.4 | 4.9% | $64.1B CI | 3.2% | $3.8B | $1.4B | 1,120 | 25 |
| All Disasters | 346 | 7.7 | 100.0% | $2,018.0B CI | 100.0% | $5.8B | $44.8B | 16,062 | 357 |
†Deaths associated with drought are the result of heat waves. (Not all droughts are accompanied by extreme heat waves.)
Flooding events (river basin or urban flooding from excessive rainfall) are separate from inland flood damage caused by tropical cyclone events.
The confidence interval (CI) probabilities (75%, 90% and 95%) represent the uncertainty associated with the disaster cost estimates. Monte Carlo simulations were used to produce upper and lower bounds at these confidence levels (Smith and Matthews, 2015).