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

U.S. judge rules Donald Trump defrauded banks, insurers while building real estate empire
A U.S. judge ruled Tuesday that Donald Trump committed fraud for years while building the real estate empire that catapulted him to fame and the White House, and he ordered some of the former president's companies removed from his control and dissolved.
BREAKING Hollywood writers strike declared over after boards vote to approve contract with studios
Leaders of the screenwriters union declared their nearly five-month-old strike over Tuesday after board members approved a contract agreement with studios, bringing Hollywood at least partly back from a historic halt in production.
Anthony Rota resigns as House Speaker amid condemnation for inviting Nazi veteran to Parliament
Anthony Rota has resigned from his prestigious position as Speaker of the House of Commons over his invitation to, and the House's subsequent recognition of, a man who fought for a Nazi unit during the Second World War. Now, Prime Minister Justin Trudeau is facing calls to apologize, and investigate.
ER doctor challenging 'toxic environment' in Ontario hospital after secret investigation based on unfounded murder allegation
After more than 30 years of caring for critically ill patients in emergency and intensive care, Dr. Scott Anderson is preparing to face off against the hospital where he works in London, Ont., in a case described as "unusual" by lawyers and potentially costly for Ontario taxpayers.
Canadian women's soccer team earns Olympic berth with win over Jamaica
The Canadian women's national soccer team has clinched a spot in the 2024 Paris Games after defeating Jamaica 4-1 on aggregate in Olympic qualifying.
Is broadband essential, like water or electricity? New net neutrality effort makes the case
Landmark net neutrality rules rescinded under former President Donald Trump could return under a new push by U.S. Federal Communications Commission chair Jessica Rosenworcel. The rules would reclassify broadband access as an essential service on par with other utilities like water or power.
Comedian Rob Schneider cancels trip to Canada after veteran who fought for Nazis honoured in Parliament
Comedian Rob Schneider says he has cancelled an upcoming visit to Canada in light of last week’s incident in which a Ukrainian veteran who fought with a Nazi unit in the Second World War was given a standing ovation in the House of Commons.
How reindeer on an Arctic island survived thousands of years through inbreeding
An eye-brow raising phenomenon may be behind the success of Svalbard reindeer, researchers say, according to a new study analyzing how the species used inbreeding to survive in the Arctic archipelago.
How was veteran Yaroslav Hunka's military unit linked to the Nazis?
During the height of the Second World War, Nazi Germany formed a division of Ukrainian volunteers to fight against Soviet Russia. One of its members was controversially honoured with two standing ovations in Canada's Parliament this week.