An extreme weather alert has been issued for Toronto as temperatures are expected to be some of the coldest of the season on Thursday.

Weather alerts are issued when Environment Canada expects overnight temperatures to be –15 C or lower. At that time more spaces are added at shelters and more ground crews are sent out overnight to reach those on the street who are at a greater risk of injury or death due to the weather.

The forecast for Thursday could see temperatures dip to a frigid -16 C, that could feel more like - 27 C with the wind chill. Winds are expected gust anywhere between 30 to 50 km/h from the north.  There is also a chance of up to 4 cm of snow.

Coun. Josh Matlow tweeted advice to Toronto citizens to keep an eye out for anyone who looks in need of help. People are asked to call 311 to report someone in need of assistance, unless it is an emergency when 911 is required.

Environment Canada has issued an wind chill warning for much of Southern Ontario.

The weather agency said Arctic air associated with a bitterly cold ridge of high pressure continues to seep southwards across parts of Ontario causing the cold temperatures.