
Hottest June 1 in Ottawa history
Ottawa set a new temperature record before 12 p.m. on the first day of June and the temperature kept warming up through the afternoon, as a multi-day heat event grips the capital.
Environment Canada has issued a heat warning for Ottawa and Prescott-Russell, calling for daytime temperatures of 33 C on Thursday and Friday.
The temperature hit 29.8 C at the Ottawa International Airport at 11 a.m. Thursday, setting a record for the warmest June 1 in Ottawa’s history. The old record was 29.6 C, set back in 2011. According to Environment Canada, the temperature warmed up to 35.1 C Thursday afternoon.
Relief from the heat will arrive this weekend.
"Overnight temperatures are expected to be in the high teens, providing little relief from the heat. Cooler temperatures return on Saturday," the weather agency said in a statement.
"Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category.
"Extreme heat affects everyone. The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors."
Friday's forecast high of 33 C would also break the record for the hottest June 2 in Ottawa’s history. The current record for June 2 is 30.4 C, set back in 2014.
Ottawa Public Health warns early season heat waves can be dangerous.
"Remember: early heat waves can be especially dangerous since it takes our bodies up to 2 weeks to adjust to hot weather," OPH said on Twitter. "Take it easy until your body has adjusted by drinking more water & taking extra precautions."
Here is a look at the forecast for Ottawa.
Expect sunny skies on Thursday and a high of 33 C. The humidex will make it feel more like 35.
It will be partly cloudy this evening with a 30 per cent chance of showers and a risk of a thunderstorm. The overnight low will be 19 C.
Friday will see a mix of sun and cloud, with a 60 per cent chance of showers in the afternoon. There will also be a risk of a thunderstorm. High 33 C, with the humidex making it feel like 37 degrees.
It will be cloudy Friday evening with a 40 per cent chance of showers. The overnight low will be 14 C.
The outlook for the weekend calls for a mix of sun and cloud and a high of 23 C on Saturday. Sunday will see a mix of sun and cloud, with a high of 25 C.
The normal temperatures for this time of year are a high of 22 C and a low of 11 C.
CTVNews.ca Top Stories

Murder charge laid in killing of B.C. Mountie
The day after an RCMP officer was killed and two others were injured while executing a search warrant in Coquitlam, B.C., charges of murder and attempted murder have been laid.
Key to mending broken labour relations is fixing inflation, RBC economists say
High inflation is driving workers to take labour action and press for wage increases, according to a new report by Canada's largest bank that says more turbulence could be on the way for Canadian labour relations
Sikh groups ask Canadian political parties to present 'united front' against India
Two groups in the Canadian Sikh diaspora are calling for Canada's political parties to "present a united front" on India after Prime Minister Justin Trudeau announced a "potential link" between the shooting death of a local leader and the Indian government.
Canada to get rare asteroid sample after OSIRIS-REx drops cargo to Earth on Sunday
Seven years after it blasted into space to snag a sample of an asteroid, a spacecraft is set to deliver its rare cargo on Sunday -- and Canada is getting a piece of the interstellar bounty.
EXCLUSIVE 'Shared intelligence' from Five Eyes informed Trudeau's India allegation: U.S. ambassador
There was 'shared intelligence among Five Eyes partners' that informed Prime Minister Justin Trudeau's public allegation of a potential link between the government of India and the murder of a Canadian citizen, United States Ambassador to Canada David Cohen confirmed to CTV News.
Moneris says systems back online after users across Canada report outages affecting debit, credit payments
The payment processing company Moneris says it has resolved an outage that appeared to affect debit and credit transactions across the country.
A Black student was suspended for his hairstyle. Now his family is suing Texas officials
The family of a Black high school student in Texas who was suspended over his dreadlocks filed a federal civil rights lawsuit Saturday against the state's governor and attorney general, alleging they failed to enforce a new law outlawing discrimination based on hairstyles.
Manitoba could make history by electing first First Nations premier to lead province
A First Nations premier would head a province for the first time in Canadian history if the New Democrats win the Oct. 3 Manitoba election, and the significance is not lost on party leader Wab Kinew.
Canada's international student program faced with 'integrity challenges,' senators say in push for reform
A group of Canadian senators is proposing a series of reforms to the country's international student program that include ways of protecting newcomers from fraud and abuse, as well as greater regulations and penalties for recruiters and educational institutions.