@glitterbag,
We had a storm cell site over my city this summer and one in 2004 that each created over $100 million dollars in damage. Thankfully, power was not an issue, but very few city's storm or sewage systems can handle a downpour like this.
I remember driving during the '04 storm and watching man hole covers being pushed up over 6 ft, suspended on raging spouts of water. One after the other, they popped off all the way down a major road. Thankfully, most of the cars had pulled over or these projectiles could have tipped a car and or killed someone. The water filled underpasses in seconds, trapping people in cars, some nearly drowned. The only reason they didn't is because the storm surge left as quickly as came.
Sandy is predicted to move slowly and sit in some areas for hours. Then add wind...
Stay safe.