Heat warning for Hamilton, after a respite on Friday

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Published August 27, 2021 at 12:00 am

There will be some relief from effects of climate change in Hamilton on Friday, before the humidity returns this weekend.

Environment Canada issued a heat warning for several population centres in Southern Ontario shortly after 11 p.m. on Thursday. Hot and humid conditions are expected to resume on Saturday. Daytime highs will be between 29 and 31 C. With the humidex, it will feel like 37 to 42 C.

Due to climate change, Hamilton over the next three decades is expected to have twice as many extreme-heat events annually as it did per year from 1976 to 2005.

In the meantime, Friday’s from the national weather agency is 27 C. The official temperature in Hamilton is taken at John C. Munro Hamilton International Airport on Hamilton Mountain. Lower-city neighbourhoods where there is more traffic congestion and population density often feel much warmer.

Hot and humid air can also worsen air quality and push the air quality health index into the higher-risk categories.

Risks from extreme heart are greater for young children, pregnant woman, older adults, people with chronic illnesses and those who are working or exercising outdoors.

The effects of heat illness include swelling, rash, cramps, fainting, heat exhaustion and the worsening of some health conditions.

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