After a seven day heat wave, Toronto will see temperatures cool down to seasonal levels by Thursday evening.This comes after smoky air in Toronto prompted many camps to make last-minute changes, especially on Monday, when the city’s Air Quality Health Index reached a “very high risk” rating of over 10. Related:‘Worrisome’ conditions due to wildfire smoke and heat force camps, daycares to adjustBy Wednesday the air quality improved slightly, with a “moderate to high risk” rating of 7. That is expected to decrease to 3 tomorrow, as a cold front cools down the atmosphere.The first half of Thursday will have a humidex value climbing up to 39, which makes conditions humid and muggy. However, temperatures are expected to cool down to 23 °C in the evening, and down to 15 °C by Friday morning.Conditions are forecast to remain seasonal during the weekend with highs of 27 °C on Saturday and 28 °C Sunday.Although subject to change, Toronto will likely experience another heat wave beginning Wednesday July 23.