Season’s 1st tropical storm Aletta forms in eastern Pacific - NHC

People walk through floodwaters near Interstate 10 in Houston on Aug. 27 2017

People walk through floodwaters near Interstate 10 in Houston on Aug. 27 2017

Taken together, these two studies suggest that climate change is already increasing the dangers posed by hurricanes and typhoons in far more ways than previously thought, and it will continue to compound numerous hazards, especially the threat of severe flooding. A fast storm can distribute its water across a wider surface area, decreasing the chance of extreme flooding. It points directly to the example of Hurricane Harvey, whose catastrophic rains were enabled by the storm's lingering in the Houston area for such a long period. But when Atlantic storms hit land - like Harvey did in 2017 - the study said the slowdown is a significant 20%. But one scientist with the U.S. National Oceanic and Atmospheric Administration made a decision to look back in time, to see what happened in the past.

Kossin published his findings Wednesday in the journal Nature.

That's the real risk of a slower storm.

The cause? Most likely, changing wind patterns due to global warming.

Christina Patricola, a scientist with the climate and ecosystem sciences division of California's Lawrence Berkeley National Laboratory, called Kossin's work "important and new" and says she found it "pretty convincing".

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To understand the relationship between climate change and hurricane speeds, Kossin analyzed the paths of 7,585 tropical cyclones from 1949 to 2016.

That means a storm that may already hold more moisture will have time to drop more of it in each spot.

They say while global warming is projected to increase the severity of the strongest tropical cyclones, warming may bring other more serious effects such as the general weakening of summertime tropical atmospheric circulation.

Another study that came out recently, using computer models, concluded that future storm movements will slow because of climate change.

"What we're seeing nearly certainly reflects both natural and human-caused changes", Kossin said.

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