For those stranded by a flood, disaster experts say survival depends on access to oxygen, food and water.

School principal Rajendra Dawadi's quick decision to evacuate his school saved at least 900 students from devastating flash floods in Nepal last week.

The storm has intensified quickly since becoming a hurricane Sunday and has been fueled by warm waters far offshore, the U.S. National Hurricane Center in Miami said.

At least two bodies have been recovered since a major flash flood swept through the Grand Canyon.