Aon has launched the latest edition of its monthly Global Catastrophe Report for the month of May, which found that the US suffered considerable disaster-related losses despite a “quieter” start to the tornado season. For the month of May, the US dealt with four separate severe weather events that cost millions of dollars. Notably, this was despite a relatively subdued start to tornado season — fewer than 450 tornadoes were reported as of June 01. This puts 2018 in the lowest 25% of years since 1950.