Hurricanes may stall due to lack of nearby weather systems to pull them along or the presence of a high-pressure system blocking their movement. For example, the remnants of Hurricane Harvey stalled in 2017 due to high pressure over the U.S., causing excessive rainfall.
Slower-moving storms like Debby have more time to rain over an area, significantly raising the flood risk. This was evident as Debby deluged cities and farms in Florida, Georgia, and the Carolinas with over a foot of rain.
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