The heavy rains that caused catastrophic flooding in South Africa in mid-April were made twice as likely to occur by climate change, scientists said Friday.
An analysis of the flooding, which killed more than 400 people in Durban and surrounding areas in the eastern part of the country, found that the intense two-day storm that caused it had a 1-in-20 chance of occurring in any given year. If the world had not warmed as a result of human-caused emissions of greenhouse gases, the study found, the chances would have been half that, 1 in 40.
The study, by a loose-knit group of climate scientists, meteorologists and disaster experts called World Weather Attribution, is the latest in a string of analyses showing that the damaging effects of global warming, once considered a future problem, have already arrived. And extreme events like this one are expected to increase as warming continues.