Date: October 22, 2018

Mainly sunny. Wind southwest 20 km/h gusting to 40. High 11. UV index 3 or moderate.

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4.1C

Environment Canada
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Flooding

This page was reviewed or revised on Thursday, July 2, 2015 8:57 AM

Flooding can occur at any time of the year with little or no warning. It is the result when water cannot run off or cannot run off quickly enough to stop accumulating. A rapid rise in temperature in the spring when the ground is still frozen, a heavy rainfall event when the ground is already saturated with water, or a break in a dam can all lead to a flood.

The severity of a flood will likely increase in an area of low laying land or an area known as a floodplain but even properly designed towns and cities can be affected. An urban area experiencing localized heavy rain from a series of storms will flood when the rate of rainfall exceeds the drainage capacity of the area overwhelming the capacity of drainage systems, such as storm sewers.

Lambton County is serviced by two different Conservation Authorities who has the job to help predict flooding, the Ausable Bayfield Conservation Authority and St. Clair Conservation Authority. The Conservation Authorities issue statements to help the public understand current conditions and help them better prepare. Please click on flood predictions and warnings for more information.

There are four different types of statements:

Water Safety Statement: Indicates that high flows, unsafe banks, melting ice or other factors could be dangerous for users such as anglers, boaters, swimmers, children or pets. Flooding is not expected.

Flood Outlook Statement: Gives early notice of the potential for flooding based on weather forecasts calling for heavy rain, snow melt, high wind or other conditions that could lead to high runoff, cause ice jams, lakeshore flooding or erosion.

Flood Watch: This level notifies that the potential for flooding exists within specific watercourses and municipalities. Municipalities, emergency services and individual landowners in flood-prone areas should prepare.

Flood Warning: Flooding is imminent or already occurring in specific watercourses or municipalities. Municipalities and individuals should take action to deal with flood conditions. This may include road closures and evacuations.

Well Water and Flooding

If you are on a well and your property is flooded, it is recommended that you choose a different source of known safe water and have your well tested. View the Private Well Water section for more information.

Testing your well water at least three to four times a year for bacteria is highly recommended. Even though your water may appear to be fine, there are many possible contaminants that cannot be tasted, seen or smelled.

Testing your well water is particularly important when flooding occurs on your property because harmful micro-organisms that can make you very ill is much more likely to infiltrate your well when surface water is around the well head.

The test for bacteria (total coliform and E. coli) is free. Water samples must be dropped off within 24 hours of being taken. Sample only from the cold water tap and refrigerate until ready for drop-off. Transport the sample in a cooler with an ice pack.

If your property is flooded, it is recommended that you choose a different source of known safe water while waiting for your test results. If you must use your water, ensure that it is brought to a rolling boil for at least 1 minute and allowed to cool before drinking, preparing food, and or brushing your teeth.

If your properly floods on a regular basis it is recommended a treatment system be added to your well for added safety.

View the Private Well Water section for locations to pick up water sample kits. Water sample kits are also available at local municipal offices.


Other Helpful Links

Before a Flood, During a Flood and, after a flood