DES MOINES, Iowa (AP) The Iowa Department of Natural Resources is warning that warm weather and high water temperatures could lead to blue-green algae in Iowa lakes.
The DNR says the algae grows quickly in warm, shallow and undisturbed water, which has become increasingly common during the hot, dry summer.
Although it's called blue-green algae, water where the algae exist can appear pea-green or reddish-brown.
People exposed to the water can develop irritated skin and rashes. It can be more dangerous if the water is swallowed, including the possibility of headaches, nausea, liver injuries and respiratory problems.
The DNR recommends that people not swim or boat in areas where the water is discolored and to keep their pets out of such water.
People should rinse off if they come in contact with such water.