What happened: Avoid strenuous outdoor activity during the hottest hours and seek shade or a cool indoor place when possible.

Why it matters: Drink water regularly and check on older adults, children, pregnant people and anyone with chronic conditions.

Related Respiratory health checklist: what families should watch this season

What to watch: Know warning signs such as dizziness, confusion, heavy sweating or fainting, and seek urgent help if heatstroke is suspected.

Read next Heat safety checklist: reduce health risks during extreme temperatures

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