On Wednesday, the threat shifts farther east, with parts of Alabama, Georgia, Tennessee, Kentucky, South Carolina, North Carolina, Virginia and West Virginia at moderate risk of severe weather, including damaging winds and isolated tornadoes, the Storm Prediction Center said.

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Bangladesh, low-lying and with isolated villages, is extremely susceptible to the storm surge Sidr is expected to bring.

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An unknown number of hikers and campers may have weathered the Thursday night storm on the dozens of trails and isolated primitive camping sites in the most hard-hit western portion of the park, spokesman Carey Jones said Friday morning.

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