Extreme heat warning issued for City of Toronto, GTA

A heat warning previously in effect for the City of Toronto and the GTA has been upgraded to an extreme heat warning for Monday.

According to Environment Canada, temperatures are expected to reach a high of 34 C and a UV index of 8 by the afternoon.

There is a 40 per cent chance of showers this afternoon and a 60 per cent chance of thunderstorms in the early evening. However, the high temperatures are expected to remain in the low to mid-thirties until after midnight on Monday.


With the current weather conditions, Environment Canada said there is a possibility “severe thunderstorms” with wind gusts or large hail could develop. The southwest winds this evening are expected to reach 50 kilometres an hour.

Wind and hail can cause damage to buildings and vehicles, Environment Canada warned. They said to take cover immediately if a storm approaches.