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Event Brief

Canada wildfire smoke and heat wave prompt health warnings

Wildfire smoke combined with an intense heat wave blanketed parts of North America, prompting health warnings to limit outdoor activity.
WHO: Health authorities and residents in affected areas
WHAT: Health warnings were issued to limit outdoor activity due to wildfire smoke and an intense heat wave.
WHEN: Jul 18, 2026 at 6:16 AM ET
WHERE: Canada
WHY: Smoke from wildfires and an intense heat wave increased health risks, leading to warnings to reduce outdoor exposure.

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