Eleven states in the US east coast reported deaths from Irene, which moved out of the US territory on August 28 but left many states in a mess.

A total of 2.85 million customers still are without power due to Irene, the U.S. Department of Energy said. An even bigger threat is widespread flooding caused by tidal waves and torrential rains.

In Vermont, the worst flooding in 84 years made many roads and bridges remain impassable. The state government began mobilizing helicopters to deliver food, drinking water and other essentials to those stranded by severe flooding.

Federal emergency officials began touring the affected states and assessing damages they suffered.