If the forecast holds true, this is going to be a long weekend for the record books across Southwestern Ontario.
Starting Thursday, a blanket of hot and sticky air will settle over the region, and it is not expected to pass until possibly Wednesday.
Environment Canada Meteorologist Geoff Coulson says we can expect extreme heat and humidity warnings, and potentially severe thunderstorm warnings.
"One of the longest stretches of heat and humidity that we've seen in the last little while," says Coulson. "Last summer, we didn't really see a lot in the way of heat and humidity. 2016, there was more but perhaps not an event that could last as long as this one."
Early indications of the heat wave prompted Environment Canada to issue a special weather statement Tuesday.
On Saturday, Windsor-Essex is expected to smash a record for heat set in 1941. The anticipated high is 37 C but with the humidity, it will feel more like 47C.
For those who are better versed in the Fahrenheit scale, that is 98.6F with a humidex of 116.6 F.
The old record is 34.4 C. Similar temperatures are expected in Chatham-Kent, while London will flirt with its own records Saturday and Sunday as it gets up to 34 C. The record for London on Saturday is 33.9 C set in 1964.
"[That is] dangerous if you are spending a lot of time outside, or doing a lot of strenuous activities," says Coulson. "Certainly want to keep an eye on the very young and the elderly, folks that don't have air conditioning because even those overnight temperatures are still going to be very warm, so not a lot of relief."
On Canada Day, the high is expected to reach 35C in Windsor-Essex and Chatham-Kent, and 33 C in the London area.
With all that hot soupy air, Coulson admits the potential for thunderstorms late on Canada Day and Monday will be elevated.
"A lot of the ingredients are there for us to see the potential for large hail, damaging winds, and in some rare situations, maybe even a tornado," he cautions.
Coulson says the agency will issue warnings and watches when appropriate.