
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

Facing calls to resign, Speaker Rota meeting with House leaders Tuesday: sources
House of Commons Speaker Anthony Rota will be meeting with the House leaders of all parties today, sources confirm to CTV News. The meeting comes amid acrimony over his invitation to and the House's subsequent recognition of a man who fought for a Nazi unit during the Second World War.
Poster advertising 'whites-only' children's playtime sparks outrage in B.C. community
Police have launched an investigation into a poster inviting "proud parents of European children" to participate in racially segregated playtime in B.C.'s Lower Mainland.
Developer says it's moving to build 5,000 rental units because of Liberals' GST break
A Toronto-based real estate company says it is planning to build 5,000 new rental units in urban centres across the country as a result of the federal government's decision to eliminate GST charges on rental developments.
No new oil, coal projects needed as fossil fuel demand to peak this decade: IEA
Even if no new government climate policies are introduced before 2030, global demand for fossil fuels will still peak before the end of the decade, a new report by the International Energy Agency states.
Arguments set to begin in Peter Nygard sex-assault case in Toronto
Arguments in the Toronto sexual-assault case against former Canadian fashion mogul Peter Nygard are expected to begin today.
These are the 5 headlines you should read this morning
House Speaker Anthony Rota is facing calls to resign, U.K. police announce an investigation into Russell Brand, and a new report says the world doesn't need any new oil and gas projects.
Canadian air force investigating 'inappropriate and unapproved' call sign broadcast on U.K. flight
The Royal Canadian Air Force (RCAF) is investigating an ‘inappropriate and unapproved’ call sign that was transmitted electronically from one of its aircraft on Monday.
Spain charges pop singer Shakira with tax evasion for a second time and demands more than US$7 million
Spanish prosecutors have charged pop star Shakira with failing to pay 6.7 million euros in tax on her 2018 income, authorities said Tuesday, in Spain's latest fiscal allegations against the Colombian singer.
David McCallum, star of hit TV series 'The Man From U.N.C.L.E.' and 'NCIS,' dies at 90
Actor David McCallum, who became a teen heartthrob in the hit series 'The Man From U.N.C.L.E.' in the 1960s and was the eccentric medical examiner in the popular 'NCIS' 40 years later, has died. He was 90.