Some of the hidden dangers associated with floodwaters may include:

Electrical hazards
Chemicals and waste
Insects and animals
Sharp debris

Electrical hazards

Strong winds that accompany storms can knock down power lines. You may be at risk for electrocution when walking or driving through flooded areas where downed power lines are present, says the Center for Disease Control and Prevention (CDC). If you see downed power lines near your home, do not walk near or through floodwater. Instead, get to a safe place and call local authorities to alert them of the situation.

You also shouldn't turn on any light switches or use electrical appliances or items in your home if the electrical system has sustained damage. Call a professional for help to inspect your home's electrical system or if you're uncertain whether it's safe to use.

Chemicals and waste

Chemicals and sewage can contaminate floodwaters and cause gastrointestinal issues, infections, rashes and other illnesses, according to the CDC. After a flood, you should not bathe, drink or cook with your home's water supply until it's been tested or determined that it's safe for use.

Insects and animals

It's not uncommon for floods to contain or attract wild animals, such as snakes and rodents, says the CDC. The mosquito population can also increase in flooding areas since they require water for breeding, according to the Environmental Protection Agency. Be cautious when walking through floodwater and keep an eye out for wild animals. You should also get rid of standing water as soon as possible by draining or emptying standing water that may have collected in buckets, gutters, pools or other containers.

Sharp debris

Floodwater can carry sharp objects or other dangerous debris that may be hard to spot, says the National Weather Service. While you should avoid walking or driving through floodwater, it's possible that you may come into contact with water as you return home to complete post-flood cleanup. When entering your home, use caution and help protect yourself by wearing rubber boots, gloves and eye protection during cleanup, says the CDC.