Wildfire smoke from western Ontario is once again making an appearance in Toronto this week with sunny but hazy conditions throughout Tuesday.While the smoke is in the moderate range, it is staying aloft and not adversely affecting the Air Quality Index (AQI), which remains low. Outdoor activities are safe during low AQI periods but it is expected to rise slightly on Wednesday. Thereafter a northerly wind will help dissipate the smoke and push it south, leaving clearer skies by Friday.Southwestern Ontario will see storms with heavy downpours, hail and strong winds on Tuesday while Toronto will remain clear.But Toronto will see occasional heavy downpours on Wednesday as humidity rises.The first round of storms is expected to pass through the City of Toronto on Wednesday between 9 to 11 a.m. followed by a break in the afternoon. Another round is expected between 5 to 6 p.m. Conditions are clear for the rest of the night in the city, while areas west of Toronto will possibly see some evening storms as well.Drivers are advised to drive as per the conditions and if you’re looking to get out on the water, it might not be the best day as conditions can change quickly and unexpectedly. Thursday, Friday and Saturday are clear with highs expected to be between 24 to 29 C. Mugginess and rain return on Sunday with afternoon showers and a humidex of 33.