SunEnvironment Canada has issued a Heat Warning for North Bay, Powassan, Mattawa, West Nipissing and French River.

They say everyone is at risk from heat illnesses – but especially older adults, young children and infants, and those with chronic illnesses such as breathing difficulties or heat conditions.

They say drink plenty of liquids especially water if you feel thirsty.

The warning comes amid a hot air mass moving into portions on Northeastern Ontario this week. Daytime highs are expected in the low thirties today and tomorrow – with warm overnight temperatures.