CNN — Pounding rain soaked tornado-ravaged Moore, Oklahoma, on Thursday morning, and winds sent pieces of debris flying, hindering recovery efforts three days after the devastating tornado.
The number of injured rose as authorities announced that 353 people were hurt in Monday's massive twister, while 24 people were killed.
As water gushed through the streets Thursday, the National Weather Service issued a flash flood warning for the Oklahoma City area, including Moore, and a severe thunderstorm warning as well.
Predictions of heavy wind gusts also brought with them the possibility -- though slight -- of an isolated twister in the area.
A group of people who rode out Monday's ferocious tornado in a bank vault huddled together under a tarp early Thursday near a CNN crew.
Conditions were expected to improve somewhat later in the morning. But more thunderstorms could be ahead for the region through Memorial Day weekend.
--CNN's Sean Morris, Judson Jones, Vivian Kuo, Jennifer Delgado and John Berman contributed to this report.
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