Prepare to be sweaty. Canada is in the middle of a hot summer, and a southern Ontario heat wave is making things even worse. Some areas are going to be even hotter than the Sahara today.

Environment Canada issued a heat warning for Toronto and the rest of Ontario's southern region.

They warn that temperatures could be hitting anywhere from the low 30s all the way up to the low 40s throughout the weekend.

The Weather Network's forecast calls for a high of 33 this afternoon, with the humidex pulling that up to 39.

What may surprise you is that the Western Sahara region is actually going to be one degree cooler than that.

According to data from Yr, a joint online weather service from the Norwegian Meteorological Institute and the Norwegian Broadcasting Corporation, the high for that region today will be 38.

They're even expected to get a nice refreshing breeze coming in from the north.

Environment Canada is advising people in Ontario about deteriorating air quality due to the extreme heat and humidity

People who have to be outside today should be on the lookout for any signs of heat illness.

These include "swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions."

Another precaution Environment Canada has told people to take is to try and eat cool, light meals today.

So if you're out on a patio, you might want to go with a chicken caesar salad instead of, for example, shepherd's pie.

You might also want to switch out your morning coffee for an iced or cold brew.

You'll definitely also want to keep drinking plenty of water to avoid dehydration. However, you'll want to avoid leaving any clear bottles in your car.

According to the Weather Network, the magnification of sunlight through the plastic can start fires.

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