Environment Canada has issued another heat warning for Southern Ontario.

Daytime temperatures are expected to reach 31 degrees with a heat index approaching 40 degrees celsius.

Overnight lows will stay above 20 degrees tonight and it’ll be another scorcher tomorrow.

During a heat warning, you are reminded to drink plenty of water and never leave people or pets inside a parked vehicle.

Some relief is expected Sunday with a chance of showers or thunderstorms during the day.