My mother just moved from Houston to the northern part of the state of Texas. But she went through a lot of hurricanes. When the authorities say get ready, they mean it. 9 times out of 10, the hurricane missed Houston, but it is the 10th time that makes the difference.
Streets are flooded. No power, no way to keep anything cold. A couple of years ago, I think it was Hurricane "Ike", where they put all the the lanes of I-45 going north. Mom didn't make it out of Houston, but my brother was a trooper and stood in line hours to get ice for them.
Pray for the folks on the East Coast.