Human-caused climate change boosted a devastating Hurricane Helene ‘s rainfall by about 10% and intensified its winds by about 11%, scientists said in a new flash study released just as a strengthening Hurricane Milton threatens the Florida coast less than two weeks later.
The warming climate boosted Helene’s wind speeds by about 13 miles per hour (20.92 kilometers per hour), and made the high sea temperatures that fueled the storm 200 to 500 times more likely, World Weather Attribution calculated Wednesday from Europe . Ocean temperatures in the Gulf of Mexico were about 3.6 degrees Fahrenheit (2 degrees Celsius) above average, WWA said.
“Hurricane Helene and the storms that were happening in the region anyway have all been amplified by the fact that the air is warmer and can hold more moisture, which meant that the rainfall totals — which, even without climate change, would have been incredibly high given the circumstances — were even higher,” Ben Clarke, a study co-author and a climate researcher at Imperial College London , said in an interview.