This year’s three most devastating storms—Beryl, Helene, and Milton—increased by 18 mph, 16 mph, and 24 mph respectively because of climate change. Human-caused climate change made Atlantic hurricanes about 18 miles per hour (29 kilometers per hour) stronger in the last six years, a new scientific study found Wednesday.For most of the storms—40 of them—the extra oomph from warmer oceans made the storms jump an entire hurricane category, according to the study published in the journal, Environmental Research: Climate.