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

1 RCMP officer killed, 2 seriously injured while executing search warrant in Coquitlam, B.C.
One RCMP officer was killed and two others were seriously injured while police were executing a search warrant at a home in Coquitlam, B.C., Friday.
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.
'He was truly exceptional': Slain B.C. RCMP officer identified
B.C. RCMP has identified the officer killed while executing a search warrant in Coquitlam Friday morning as Const. Rick O'Brien.
WATCH Video of rats running on wall prompts closure of Waterloo Tim Hortons
A Tim Hortons on University of Waterloo campus has been closed after a video of rats scurrying down one of the restaurant’s walls surfaced online.
TREND LINE Conservatives extend summer lead over Liberals, NDP sees bump in Nanos ballot tracking
With the fall sitting of Parliament underway, Nanos ballot tracking shows the federal Conservatives continue to hold onto the lead they’ve had all summer while the Liberals remain stalled, and the NDP has managed to gain a bit of steam in third place.
How does India's visa office suspension affect Canadian travellers?
The suspension of Indian visa services for Canadians this week has prompted uncertainty among many who had hoped to travel to India in the near future. Here's what the visa centre closure could mean for India's sizable diaspora community in Canada, which is now caught in the middle of rising diplomatic tensions between the two countries.
Who's Bob Menendez? New Jersey's senator charged with corruption has survived politically for years
Bob Menendez, 69, has survived politically for nearly five decades. The son of Cuban immigrants and an attorney by training, he was a Union City, New Jersey, school board member at age 20 -- before he graduated from law school -- and went on to become the mayor of the city. Here's some of what we know about him.
Premier Doug Ford announces cabinet shuffle hours after 3rd minister resigns in a month
Premier Doug Ford is shuffling his cabinet for the second time in recent weeks after Ontario Labour Minister Monte McNaughton announced Friday he is stepping away from politics to move into the private sector.
Cost of foreign interference probe nears $1.9 million; $1.7M goes to law firm
A Toronto-based law firm was awarded a nearly $4.5 million contract to work on former special rapporteur David Johnston's ill-fated foreign interference probe. The investigation has so far cost taxpayers almost $1.9 million, CTV News has learned.