Causes of flooding

 Learn the causes of flooding.

Before a flood
 During a flood
  • Report high levels of water in rivers, residential streets and low-lying areas to your local municipality.
  • Don't drink or wash in flood waters.
  • Stay away from rivers and creeks that are flooded and take extra precautions with children and pets.
  • Don't walk or drive through flooded roads - water accumulation can compromise the safety of sidewalks and streets.
  • Don't enter closed buildings or secured areas.
 Electrical safety during a flood
  • Never step into a room where water may be in contact with electrical outlets or power bars on the floor.
  • Never attempt to turn off power if you must walk through water to do so.
  • Call your local hydro company to have the power shut off.
  • Take additional precautions in the event of a power failure.
 After a flood
  • Ensure proper cleanup of your home and property to protect against long-term risks of mould and seepage.
  • Don't walk or drive through flooded streets.

The Insurance Bureau of Canada provides a wealth of information and tips on getting the right insurance to protect your home. 

 The Grand River Conservation Authority (GRCA)


Flooding is common in Waterloo Region in the spring and summer. With snow melting, large amounts of water can accumulate. Major rainstorms can cause flooding, streams and rivers can overflow without warning, and sewers may back-up.