LONDON, ONT -- It’s another 'heat wave weekend' across the city.

Environment Canada has issued heat warnings for most counties in southwestern Ontario as hot humid weather is expected to carry through Tuesday. 

In the London region, the humidex values expected to reach near 40 degrees. 

So what better way to cool down on a sunny Sunday then to dive head first into a pool?

The City of London has eleven outdoor pools, including the popular Byron pool on Brock Lane. 

Six-year-old Johnathan was there with his family, beating the soaring temperatures and humidity. 

Johnathan enjoys the pool

Johnathan cools down in the Byron pool on Sunday, July 26 (Jordyn Read / CTV News)

"I like this pool because it’s big," says Johnathan. "My mom bought me some (pool) floats, one’s a poop emoji, and some other floats." 

On Friday, the health unit tweeted, warning the region about the 'intense heat' and asked for people to "take precautions to prevent the spread of COVID-19" during the extended heat warning. 

With new COVID-19 rule and regulations, the pool hits capacity at 30 people. 

If you are planning to cool down at an outdoor pool in London, you do have to make an appointment ahead of time online.

Staff at Byron Pool are asking for swimmers to arrive about five-minutes before their time-slot and no earlier. 

A time-slot will get you an hour and a half of swimming time. 

"It’s very easy, very, very easy," says Chase who was swimming laps with his friends in the Byron pool. 

Heat warnings are issued when there are two consecutive days forecasted to have daytime highs of 31 degrees or more or a humidex higher than 40 degrees.

According to Environment Canada, hot and humid air can bring deteriorating air quality and result in the air quality health index approaching the high risk category.

Young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors are at a higher risk for heat related illnesses.

The counties under the heat alert are:

  • London-Middlesex
  • Windsor-Essex
  • Chatham-Kent
  • Sarnia-Lambton
  • Elgin
  • Oxford
  • Norfolk
  • Brant
  • Huron-Perth
  • Waterloo-Wellington

Heat warnings are also in place for areas around Toronto and stretching to the Ottawa region.

The public is reminded to check on vulnerable family members, to take precautions when heading outside, and to never leave people or pets inside a parked vehicle.

Temperatures are forecasted to return to below 30 degrees on Tuesday.