Sweltering conditions continue in Waterloo region

Hot humid air continues to hang over much of Ontario, including Waterloo region where a heat warning remains in effect.

Hot humid air continues to hang over much of Ontario, including Waterloo region where a heat warning remains in effect. 

Environment Canada says a multi-day heat event started Tuesday and will stretch into Thursday.

Daily highs in the high 20s to low 30s are forecast, with humidex values in the high 30s to low 40s.

"And overnight, there won't be much relief," said Trudy Kidd, warning preparedness meteorologist with Environment Canada.

“Extreme heat affects everyone,” Environment Canada said in an alert. “Drink plenty of water even before you feel thirsty and stay in a cool place.”

The agency also warns residents to watch out for effects of heat illness, such as swelling, rashes, cramps, and fainting.