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Haldimand-Norfolk Health Unit Issues Heat Warning

Environment and Climate Change Canada has issued a Heat Warning for Haldimand and Norfolk counties for conditions expected to begin July 26, 2023. The criteria for a Heat Warning is daytime high temperatures reaching 31°C or greater and minimum overnight temperatures of 20°C or greater or humidex of 40 or greater, with hot and humid conditions lasting 2 consecutive days.

Everyone is at risk from heat, especially older adults, infants and young children, those with certain medical conditions, people who work or exercise in the heat, the homeless and low-income earners. Warning signs of heat-related illness include dizziness, headache, nausea or vomiting, weakness, confusion, fainting, rapid breathing and heartbeat. If you or anyone else experience any of these symptoms seek immediate medical attention.

For more information, please visit and follow the Haldimand Norfolk Health Unit on Twitter and Facebook.

Should you wish to unsubscribe to receiving heat warning emails from the HNHU, please reply via email or contact us at 519-426-6170 or 905-318-6623 and ask to speak with the Environmental Health Team.

To sign up to receive forecasted heat event emails from Environment and Climate Change Canada, visit