The catastrophic damage from Hurricane Helene is a reminder of climate change's impact: as the Earth heats up, rainfall is becoming increasingly extreme and deadly.
Engineers design infrastructure using old rainfall records that are sometimes decades old. This means newly built infrastructure often only accounts for last century's storms.
The average annual flood losses in the U.S. are roughly doubling every decade, signaling an unsustainable trend that cities must address urgently.
NOAA is updating rainfall data and models to provide cities with new tools for better flood preparedness as storm intensity and frequency increase.
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