Hurricane Ida's winds intensified rapidly as the storm approached coastal Louisiana over the weekend — making landfall at its most powerful. NPR's Rebecca Hersher explains how Ida was supercharged by climate change.

Now the hurricane's remnants are moving north and east, where millions are bracing for flooding and tornado threats. Janey Camp with Vanderbilt University tells NPR why climate change means flooding will become more common in areas where people haven't been accustomed to it in the past.

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