Environment Canada issues heat warning across Southern Ontario

The sun is shown in this file photo. (Shutterstock/Maryloo)

If you plan to spend time outside this week you will want to stay hydrated and dress for warm weather.

According to Environment Canada a heat episode is expected on Thursday and Friday for most regions in Southern Ontario. Daytime temperatures will reach low thirties with afternoon humidex values in the mid to upper thirties. Overnight lows will be near 20 degrees.

A heat warning has been issued for:

The heat episode will come to an end Friday night with the passage of a cold front.