From NOAA: Billion-Dollar Weather and Climate Disasters: Overview
2020 in Progress…

In 2020 (as of October 7), there have been 16 weather/climate disaster events with losses exceeding $1 billion each to affect the United States. These events included 1 drought event, 11 severe storm events, 3 tropical cyclone events, and 1 wildfire event. Overall, these events resulted in the deaths of 188 people and had significant economic effects on the areas impacted. The 1980–2019 annual average is 6.6 events (CPI-adjusted); the annual average for the most recent 5 years (2015–2019) is 13.8 events (CPI-adjusted).