July 14, 2014; 11:00 AM ET
New York City will be at risk for storms bringing flash and urban flooding, as well as damaging wind gusts and hail through Tuesday. more >
Thunderstorms in the area this afternoon through this evening
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A "perfect storm" of ozone-destroying chemicals sent cancer-causing UV-B radiation soaring at the top of a South American volcano in 2003, a new study reports.
You already carry a crucial item for severe-weather safety – your smartphone.