Hot and humid weather  is expected to stick around northeastern Ontario's Highway 17 corridor all week.

Daytime high temperatures of around 30 C with humidex values in the low to mid 30s have prompted Environment Canada to extend the heat warnings for many communities in northeastern Ontario to the end of the week.

The warnings reach from Elliot and Ranger Lakes in the west across to North Bay and Mattawa in the east, and include the areas of:

  • Blind River - Thessalon
  • Espanola - Killarney
  • Geraldton - Longlac - Caramat
  • Greater Sudbury and vicinity
  • Manitoulin Island
  • Manitouwadge - Hornepayne
  • Nakina - Aroland - Pagwa
  • West Nipissing - French River

The hot and humid conditions can affect air quality and increase the health risks for young children, pregnant women, older adults, people with chronic illnesses and those working or exercising outside.

Watch for the symptoms of heat illness: dizziness/fainting; nausea/vomiting; rapid breathing and heartbeat; extreme thirst; decreased urination with unusually dark urine.

Never leave people or pets inside a parked vehicle.

Check on older family, friends and neighbours to make sure they are staying cool and drinking water.

Overnight low temperatures of mid to upper teens are expected.