Explainer: How climate change is fueling hurricanes
Florida's Gulf Coast due on Wednesday signaled activity in the Atlantic's hurricane alley might not be as quiet this year as meteorologists had once predicted. Scientists initially forecast in May that the U.S. would see a near-normal Atlantic hurricane season, but raised that forecast in mid-August, projecting a more dangerous storm season.
That is because worldwide surface ocean temperatures have been exceedingly warm this year, with temperatures in and around the Florida Keys mirroring a hot tub this summer. This, scientists said, may counteract the moderating influence of the El Nino currently in effect, which typically reduces Atlantic hurricane activity.
While scientists have not yet determined whether climate change is influencing Idalia's strength or behavior, there is strong evidence that these devastating storms are getting worse.
Here is why.
IS CLIMATE CHANGE AFFECTING HURRICANES?
Yes, climate change is making hurricanes wetter, windier and altogether more intense. There is also evidence that it is causing storms to travel more slowly, meaning they can dump more water in one place.
If it were not for the oceans, the planet would be much hotter due to climate change. But in the last 40 years, the ocean has absorbed about 90% of the warming caused by heat-trapping greenhouse gas emissions. Much of this ocean heat is contained near the water's surface.
This additional heat can fuel a storm's intensity and power stronger winds. And this year is particularly bad.
Climate change can also boost the amount of rainfall delivered by a storm. Because a warmer atmosphere can also hold more moisture, water vapor builds up until clouds break, sending down heavy rain.
