The Middlesex-London Health Unit is issuing its fifth heat alert of the season on Wednesday, with humidex levels reaching 43 in the London area.
The health entity says data from Environment Canada shows mercury is expected to peak at 32C in very muggy conditions, with humidex levels hitting 43.
Even with a 60 per cent chance of showers or thunderstorms, conditions meet the Middlesex-London Health Unit criteria for a one-day heat alert.
Nighttime temperatures on Wednesday are expected to fall to just 21C, with highs of 26C on Thursday morning. Therefore, the health unit said the heat alert is expected to remain in effect only until Thursday morning.
‘Not in our name’ – The homelessness advocacy group launches a hunger strike at London City Hall
The story continues below the ad
The health unit issues heat warnings when Environment Canada issues a forecast calling for a daily high of 31C or higher, or when Humex levels reach 40 or higher.
In hot weather, the health department recommends that people avoid spending too much time outdoors and drink plenty of water to avoid the risk of heat-related illness.
People are also being reminded not to leave pets or children in parked cars or to sleep outside in the sun.
© 2022 Global News, a division of Corus Entertainment Inc.