Mini donuts won’t be the only things frying at Stampede this week, with temperatures on the grounds expected to skyrocket to 40 degrees Celsius today.

It could be 10 degrees hotter today on the Stampede grounds than in Cancun, Mexico.  Fourteen degrees more than Honolulu, Hawaii.

Built on a black top with little shade except the brims of Cowboy hats, the grounds often see the mercury pop up higher than the actual air temperature in the city.

“It can easily be five to 10 degrees Celsius warmer when you’re in an area where you’re in the sunshine, on black asphalt, with not much wind,” said Bill McMurtry of Environment Canada.

Emergency Medical Services’ public education officer, Adam Loria, said he’s preparing for the worst.

“We have two extra ambulances for the duration of Stampede,” Loria said.

“With these temperatures here in the next few days, I’m sure we’ll get a handful of heat and sun-related emergencies.”

Enmax was forced to have rolling brown outs across Calgary, and issued a plea for lower power consumption. Environment Canada also issued a Humidex warning for the province.

World hot spots:

• Tijuana, Mexico – 29 degrees Celsius
• Cancun, Mexico – 30 degrees Celsius
• Kingston, Jamaica – 31 degrees Celsius
• Los Angeles, Calif – 33 degrees Celsius
• Miami, Fla. – 30 degrees Celsius
• Honolulu, Hawaii – 26 degrees Celsius
• Dallas, Texas – 31 degrees Celsius
• Madrid, Spain – 30 degrees Celsius