Every Atlantic hurricane that formed this year had higher wind speeds because of climate change. Two likely would have remained tropical storms without its influence
Satellite image of Category 4 Hurricane Helene making landfall in Florida, USA, with powerful winds and heavy rainfall causing widespread damage.Climate change increased the maximum wind speeds of every Atlantic hurricane that formed this year, scientists have found. All 11 storms intensified between 9 and 28 miles per hour under the influence of warmer-than-average ocean temperatures.
The full study examines not only the 2024 season, but all Atlantic hurricanes over the last five years. Between 2019 and 2023, elevated ocean temperatures boosted the wind speeds in five out of every six hurricanes, causing them to intensify by an average of 18 miles per hour. Over that time period, 30 hurricanes jumped at least one category higher than they would have been without the influence of climate change.
That doesn’t necessarily mean the total number of hurricanes will increase. But the proportion of storms that achieve major hurricane status, at a Category 3 or higher, will rise over time. “It really shows that these two completely different lines of evidence show us the same thing,” she added.Studies have found that climate change can increase the intensity of hurricane rainfall, making floods more likely and more damaging. And research suggests that water, from rainfall or from storm surge, causes more damage during tropical cyclones than winds.
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