The City of Hamilton has issued an extended heat wave warning.
This comes as skyrocketing temperatures envelop the region with highs of 30 to 35 degrees Celsius.
Environment Canada said humidex ratings are making it feel closer to 40 throughout south-central Ontario and western Quebec.
“There will be little relief through the overnight as lows are expected to be 20°C to 23°C with humidex values of 26 C to 30 C,” the city said. “Temperatures and humidex values may be several degrees cooler near the shores of the Great Lakes.”
The warning comes as the city enters its third day of extreme heat activity.
The heat warning was first issued on the eve of its arrival, Sunday.
On Monday, passing clouds and heavy downpours swept through the city during the morning, but temperatures returned to the mid-20s and eventually hit 30 degrees C by the evening.
Other regions, such as Halton, Niagara and Norfolk County, have also issued heat warnings issued for their respective areas.
Each has its own protocol when such events arise, which typically includes increased hours at municipally run cooling areas (such as pools and recreation centres), reminders to stay hydrated, and notices to check on children, older adults, and those who may be particularly heat-sensitive.
“The health risks are greater for older adults, infants and young children, pregnant people, people with physical and mental illnesses, and people with disabilities or mobility issues,” Environment Canada said.
READ MORE: Environment Canada says the extreme heat is continuing today in Ontario and Quebec