The first day of has reached record breaking weather.
The temperature at Pearson hit 34.6, breaking the old record of 34.4 set back in 1949.
The city upgraded its heat alert to an extreme heat alert Wedensday morning. That's on top of a humidex advisory and a smog alert.
The extreme heat alert means 7 cooling centres in the city are open including East York Civic Centre and Metro Hall.