Opinion: 2022's US climate disasters: A tale of too much rain – and too little
A teacher dries out books at a school that was heavily damaged by Hurricane Ian in La Coloma, in the province of Pinar del Rio, Cuba, on Oct. 5, 2022.The year 2022 will be remembered across the U.S. for its devastating flooding and storms – and also for its extreme heat waves and droughts, including one so severe it briefly shut down traffic on the Mississippi River.
While too much rainfall threatened some regions, extreme heat and too little precipitation worsened risks elsewhere. In Europe, heat waves set record temperatures in Britain and other parts of the continent, leading to severe droughts, low river flows that slowed shipping, and wildfires in many parts of the continent. Much of East Africa is still in the grips of a multiyear drought – the worst in over 40 years, according to the United Nations – leaving millions of people vulnerable to food shortages and starvation.
Extreme events, by definition, occur rarely. A 100-year flood has a 1 percent chance of happening in any given year. So when such events occur with increasing frequency and intensity, they are a clear indication of a changing climate state.Much of this is well understood and consistently reproduced by climate models.
Some of these changes can create conditions such as persistent high-pressure systems and atmospheric blocking that bring more intense heat waves. The heat domes over the Southern Plains and South in June and in the West in September were both examples.For example, higher temperatures tend to dry out the soil, and less soil moisture reduces the land’s heat capacity, making it easier to heat up.
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