Eastern Ontario faces extreme heat through Tuesday with highs up to 33°C and humidex near 40. Environment Canada issues fresh heat warning.
Prolonged Heat Wave Intensifies Across the Region
Eastern Ontario residents are facing another stretch of extreme summer heat, with Environment Canada warning that temperatures will remain in the low to mid-30s until at least Tuesday. Humidex values are forecast to make conditions feel closer to 40 °C, starting Saturday and lasting through the first half of next week.
Minimal Overnight Relief as Temperatures Stay High
Overnight lows are expected to hover between 19 °C and 23 °C, offering little opportunity for cooling. The heat wave marks the fourth official warning of the season for the Ottawa region, following one issued just two weeks ago under similar conditions.
Officials Urge Residents to Stay Safe in Extreme Heat
Health experts caution that anyone can be affected by the prolonged high temperatures, with risks including heat exhaustion and heat stroke. Symptoms may include flushed skin, dizziness, nausea, confusion, or loss of consciousness.
Practical Measures to Beat the Heat
Health Canada recommends staying indoors during peak afternoon hours, keeping hydrated, avoiding strenuous activities in direct sunlight, and using air-conditioned spaces where possible. Preparing no-cook meals and checking in on vulnerable neighbours are also encouraged.
Emergency Steps for Heat-Related Illness
Authorities advise that anyone showing signs of heat stroke should seek immediate medical attention by calling 911. Ottawa has published maps showing public cooling centres and other accessible air-conditioned facilities.
Cooler Weather Expected Mid-Week
Meteorologists forecast a break in the oppressive heat by midweek as a cold front moves in, bringing more seasonable temperatures and relief from the humidity.