Top 10 Costliest World Natural Disasters by Insured Losses, 2020 (1)

(US$ billions)

Rank Date Country/region Event Insured loss (2)
1 Aug. 21-29 U.S., Caribbean Hurricane Laura $10.0
2 Aug. 8-12 U.S. Severe convective storm (includes Midwest derecho) 8.3
3 Sep. 14-18 U.S. Hurricane Sally 3.5
4 Sep. 27-Oct. 5 U.S. Glass Fire 2.9
5 Jul. 30-Aug. 5 U.S., Caribbean, Canada Hurricane Isaias 2.7
6 Apr. 10-14 U.S. Easter Tornado Outbreak 2.7
7 Aug. 17-Sep. 22 U.S. CZU Lightning Complex Fire 2 4
8 Apr. 6-9 U.S. Severe weather (3) 2.3
9 Oct. 24-30 U.S., Caribbean Hurricane Zeta 2.3
10 Mar. 27-30 U.S. Severe weather (3) 2.2
All other events       $58.0
Total 2020       $97.0
(1) Natural disasters that cause at least US$25 million in insured losses; or 10 deaths; or 50 people injured; or 2,000 filed claims or homes and structures damaged. Hurricane losses in the United States include National Flood Insurance Program losses. As of January 2021. (2) Includes losses sustained by private insurers and government-sponsored programs. Subject to change as loss estimates are further developed. (3) Includes severe convective storms such as thunderstorms, tornadoes and hailstorms, straight-line winds and flooding that could occur with these storms. Note: Loss data shown here may differ from figures shown elsewhere for the same event due to differences in the date of publication, the geographical area covered and other criteria used by organizations collecting the data. Source: Aon.