Professors from the University of Iowa discussed the impact of the disaster on physical and mental health at a news conference Friday, the Iowa City Press-Citizen reported.

"From a public health standpoint, we will be in a much more dangerous place," James Merchant, dean of the College of Public Health, said.

Wayne Sanderson, a professor of occupational and environmental health, said that mold can continue to be a problem long after a flood. He said that someone making a quick trip home to pick up a few items is unlikely to be a risk, but those working in buildings that have been flooded should wear respirators and clothing that covers as much of their body as possible.

People with private wells were advised to have them tested.

Kathleen Staley of the University Counseling Service said that depression may also hit in the period after a flood.

Also Friday, Gov. Chet Culver announced that more counties have been approved for federal disaster relief, The Cedar Rapids Gazette reported.