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Heatwave hits Ottawa on Canada Day with warnings of heat stress and possible storms
The heat index rises to dangerous levels with high humidity and calls to reduce outdoor activities
Published: July 1, 2026
Ottawa —
The Canadian capital Ottawa has entered the Canada Day atmosphere under the influence of a heat wave and high humidity, prompting meteorological authorities to issue a warning of conditions that may pose a health risk, especially as they coincide with extensive outdoor events and celebrations.
Temperatures are expected to reach the mid-thirties Celsius, while the humidity makes the atmosphere harsher, with a heat index higher than usual levels, increasing the risk of heat stress and heat strokes.
Concerns increase due to relatively high nighttime temperatures, which reduce the body's ability to recover after hot daytime hours, especially among the elderly, children, patients, and outdoor workers.
Authorities have urged residents and visitors to drink sufficient amounts of water, avoid prolonged sun exposure, seek shaded or air-conditioned places, reduce physical exertion during peak hours, and not leave children or pets inside cars even for short periods.
The heat wave coincides with the possibility of developing thunderstorms in the area, which may be accompanied by strong winds and localized heavy rains, making the weather more volatile during daytime and evening hours.
Emergency teams and event organizers are closely monitoring weather developments, while participants in Canada Day events have been urged to follow official updates before heading to celebration sites and take necessary precautions to protect themselves from heat and potential storms.