The Vermont Department of Health wanted to share the following message:

“Given the upcoming hot weather, the Health Department advises to stay out of rivers and streams until the water is clear and calm and to use extra caution when swimming in lakes and ponds that have been affected by flooding.

Heavy rainfalls can create potentially dangerous conditions in swim holes, streams, rivers, and waterfalls. These conditions of high water or strong undercurrents can linger several days after a storm, so be sure to assess the water depth and flow before swimming or boating.

Generally, you should stay out of any body of water for at least 48 hours following a significant rain event. If there is major flooding, it will take extra time for waterbodies to recover. This is because flooding can cause combined sewer overflows (raw sewage dumped into waterbodies) as well as extra debris and fuel and other chemicals to flow into waterbodies.

Rivers, ponds, lakes and streams are always susceptible to disease-causing microorganisms and chemicals from stormwater runoff and are especially susceptible after the widespread rainfall and flooding. Swimming in these waters may result in health effects such as minor skin rashes, sore throats, diarrhea or more serious problems.

Additionally, after major flooding, extra nutrients from the floodwater may cause cyanobacteria blooms a few weeks after. Be sure to watch for cyanobacteria.

Learn more about recreational water safety after a flood. Translated versions of this handout are available at HealthVermont.gov/Flood. “