Heat warning issued for Southern Ontario

Kids in a Toronto pool, June 2019

Environment Canada has issued it's first heat warning of the year, blanketing much of southern Ontario.

The weather agency says high humidity Friday and Saturday will make it feel like near 40 degrees.

There isn't much relief at night either, with the temperature around 20 degrees.

A cold system is expected to move in for Sunday, bringing with it more manageable temperatures.