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

Homeowners brace for mortgage payment shock amid higher-for-longer rate outlook
From ultra-low interest rates that led to a huge spike in real estate demand to the speed with which interest rates shot up to levels not seen in a generation, it's been hard to keep up with the shifting landscape for mortgage holders.
India tells Canada to withdraw 41 diplomats, report says
India has told Canada that it must repatriate 41 diplomats by Oct. 10, the Financial Times reported. Ties between India and Canada have become strained over Canadian suspicion that Indian government agents had a role in the June murder in Canada of Hardeep Singh Nijjar.
Diwali fireworks advisory issued despite warnings it might be discriminatory: emails
An Environment Canada advisory that singled out Diwali fireworks as a reason to prepare for poor air quality last October was issued despite multiple warnings from some staff about it being discriminatory.
Trump seethes through the start of trial in New York lawsuit accusing him of lying about his wealth
Aggrieved and defiant, former U.S. president Donald Trump sat through hours of sometimes testy opening statements Monday in a fraud lawsuit that could cost him control of Trump Tower and other prized properties.
New study shows where you fall on new internet addiction spectrum
Researchers have come up with categories for people who are addicted to the internet and for those who are at risk.
Dry grasslands have been serving as an unexpected carbon sink in recent decades due to fire reductions: study
Dry grasslands may have been providing an unseen helping hand to slow the rate of climate warning, according to a new study which found that these grasslands have been storing more heat-trapping carbon than previously known.
Ontario Pharmacists Association says ability to prescribe birth control should be next
Pharmacists in Ontario can now diagnose and treat 19 common ailments but they still can't prescribe birth control or emergency contraception.
Blue Jays on the road for best-of-three wild-card series with Twins
The Toronto Blue Jays kick off their American League wild-card playoff series with the Minnesota Twins today at Target Field in Minneapolis.
McDonald's, Wendy's defeat lawsuit over size of burgers
McDonald's and Wendy's have defeated a lawsuit accusing them of deceiving hungry diners by exaggerating the size of their burgers.