The heat warning was ended on September 5th at 11:29pm.
Environment Canada has issued a heat WARNING for Hamilton this afternoon. A heat warning is issued if two or more consecutive days are forecast with daytime highs greater than or equal to 31°C and nighttime lows greater than or equal to 20°C or a Humidex of 40°C or greater.
Humidex values reaching 40 are expected.
More hot and humid weather for southwestern Ontario Monday through Wednesday.
A hot and humid airmass will affect the regions for the first part of the week. Maximum daytime temperatures of 31 degrees are generally expected Monday through Wednesday with humidex values near 40. Overnight minimum temperatures will likely remain near 21 degrees providing little relief from the heat.
Scattered showers and thunderstorms are possible each day which could prevent maximum daytime highs reaching 31 every day in every area. However, maximum daily humidex values are still expected to be near 40 degrees.
A cold front is expected to move through Wednesday night bringing an end to the hot and humid weather.
Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions.
Drink plenty of water even before you feel thirsty and stay in a cool place.
Seek a cool place such as a tree-shaded area, swimming pool, shower or bath, or air-conditioned spot like a public building.
Never leave people or pets inside a parked vehicle.
Source: Environment Canada