Heat warning issued for Guelph, Region of Waterloo by Environment Canada

Environment Canada has placed Guelph, Waterloo Region and Wellington County under a heat warning until Wednesday.

The agency says that during the day the region is expected to see temperatures reaching 31 degrees Celsius with a Humidex approaching 40.

While the temperature is only expected to drop to around 20C overnight, Environment Canada says there will be little relief in the evening.

Things are expected to cool down slightly on Thursday, bringing some respite to locals.

The agency warns that hot air could cause air quality to deteriorate and could push the air health rating into the high-risk category.

This agency said residents should watch for the effects of heat, including swelling, rashes, cramps, fainting, heat exhaustion, heatstroke and worsening of certain health conditions .

Environment Canada says people who need to cool off should seek shade, go swimming, shower or bathe, or find somewhere with air conditioning.

He also said you should never leave people or pets inside a parked vehicle for any length of time.