Hamilton Health officials have issued the first heat warning of the season.
Extreme heat puts everyone at risk of heat-related illnesses. People at increased risk include:
those age 65 and older
young children
people with chronic medical conditions
people who work and are active outdoors
There are two response stages and triggers:
The city has opened cooling centres in the following locations:

Heat Warning
Two or more consecutive days forecasted with daytime highs greater than or equal to 31°C and nighttime lows greater than or equal to 20°C or two or more consecutive days with a Humidex of 40°C or greater.
Extended Heat Warning
Three or more consecutive days observed with daytime highs greater than or equal to 31°C and nighttime lows greater than or equal to 20°C or three or more consecutive days with a Humidex of 40°C or greater
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