Temperatures could reach 30 degrees Celsius in parts of northwestern and northeastern Ontario, with humidity making it look closer to the mid-30s, Environment Canada says, with similar conditions expected in the southwest and southeastern Ontario. The City of Toronto will keep seven public swimming pools open until about midnight Tuesday to help residents cool off during the heat advisory. Heat warnings remain in effect for parts of northern Manitoba, where wildfires have prompted additional air quality alerts due to smoke. Environment Canada has also issued an air quality statement for the area around Lytton, BC, where a large wildfire has reached 20 square kilometres. Meanwhile, parts of southern Manitoba could see strong thunderstorms Tuesday, potentially creating the right conditions for tornadoes, Environment Canada says. Some communities in the province experienced record temperatures over the weekend. Dominion City, which is about 80km south of Winnipeg, had its hottest July 17 on record with temperatures reaching 34.2C, surpassing the previous record of 32.2C set in 1942. McCreary, located about 200 kilometers northwest of Winnipeg, also set a record for the day with temperatures of 31.9C, surpassing the record of 31.7C set just last year. Shoal Lake, about 250 kilometers west of Winnipeg, recorded temperatures of 31.2 C. Its previous record for July 17 was 30.9 C in 2011. In Saskatchewan, heat warnings are largely limited to central and northern parts of the province, with daytime temperatures expected to hover around 30 C, Environment Canada says. Parts of Saskatchewan experienced bouts of extreme weather including hail, heavy rain and intense lightning on Sunday. Heavy rain on Monday night also caused flooding in parts of Regina. The heat and humidity could make parts of southern Quebec feel like 40 C or more. A cold front moving across the province may also bring showers and thunderstorms. Across the pond, temperatures reached record levels in the UK, breaking 40C for the first time. In Spain and Portugal, a heat wave has led to nearly 750 deaths, while fires have broken out in those countries and elsewhere in Europe. With files from CTV News, The Canadian Press and The Associated Press
