The daytime high temperature reached 34.6 degrees Celsius, and 29 C near Lake Ontario. The UV index reached 10, or very high. The previous highest temperature for July 16 was set in 2002 at 34.4 C.
Torontonians are advised to call or visit family, friends and neighbours who might be at risk of heat-related illnesses, according to Toronto's medical officer Dr. David McKeown.
Isolated adults, seniors and those with medical conditions are at the greatest risk of becoming ill.
The city has recommended that residents without air conditioning in their homes visit an air conditioned public place, including a shopping mall, library or community centre.
To avoid a heat related illness, the city suggests residents:
- drink plenty of water, avoiding drinks which dehydrate the body including alcoholic beverages, coffee and pop
- stay in the shade if going outside can't be avoided
- avoid intense or moderate physical activity
- keep blinds closed and curtains drawn over windows at home, with windows slightly open
Symptoms of heat illness can include difficulty breathing, weakness and dizziness, headaches and confusion. Anyone who feels faint or disoriented is advised to visit their doctor or the nearest hospital right away.
Environment Canada said there is a 40 per cent chance of showers on Sunday evening, and a risk of a thunderstorm overnight.
Monday will see a 60 per cent chance of showers with cloudiness in the morning and afternoon. The temperature is expected to reach a high of 29 C and a low of 23 C.
The rest of the week will see temperatures reach a high of 35 C and fall to the low 20s in the evenings.
Toronto residents are asked to call the Canadian Red Cross Heat Information Line 416-480-2615 from 9 a.m. to 9 p.m. for heat advice and related services.
