Hurricane Helene’s torrential rain and powerful winds were made about 10 percent more intense due to climate change, according to a study published Wednesday by the World Weather Attribution (WWA) group. The research by WWA, an international group of scientists and meteorologists who study the role of climate change in extreme weather events, comes as the southeastern US state of Florida prepares for the arrival of another major hurricane, Milton, just 10 days after it was hit by Helene.