A heat warning is in effect for Mississauga, with hot and humid conditions expected to continue through much of the week

July 13, 2026

A Yellow Heat Warning has been issued for Peel Region, including Mississauga, based on Environment and Climate Change Canada data and Peel Region’s Medical Officer of Health.

This means residents may experience hazardous weather conditions that can lead to health impacts, especially for older adults, young children and those with existing health conditions.

The City of Mississauga is reminding residents to take precautions, stay hydrated, check on loved ones and neighbours and use public spaces to cool down when needed. The City also offers several places to stay cool, including local indoor swimming pools, air-conditioned libraries, spray pads and community centres.

What a Yellow Heat Warning means

A Yellow Heat Warning is issued when heat conditions are expected to cause moderate, short-term or localized impacts to health and daily activities.

Heat can affect your health quickly. Knowing the risks and taking simple precautions can help reduce illness and keep you and your loved ones safe.

How to stay cool

The City of Mississauga is reminding residents to take steps to stay cool and check in on others during periods of extreme heat. This is important to help prevent heat related illness and reduce pressure on emergency services.

During periods of extreme heat, small actions can make a big difference. Reduce your exposure to heat and watch for signs of heat-related illness.

• Limit outdoor activities during the hottest part of the day, from 10 a.m. to 4 p.m. Schedule strenuous activities for the early morning or evening when possible.
• Stay in the shade and limit direct sun exposure.
• Wear sunscreen, a hat, sunglasses and light-coloured, loose-fitting clothing.
• Take cooling breaks in air-conditioned spaces or shaded areas.
• Drink plenty of fluids throughout the day. Take small, frequent sips to stay hydrated.
• Eat lighter meals and choose foods with high water content.
• Use sprinklers or wading pools to cool down.
• Visit a City pool or spray pad. Pools offer extended hours during heat events. Spray pads are open from 9 a.m. to 11 p.m.
• Take a lukewarm shower or place cool water on your skin.
• Check in on loved ones, neighbours and friends, especially those who live alone.

Keep your home cooler

If your home gets too warm, these steps can help make it more comfortable:

• Close windows during the hottest part of the day to keep warm air out.
• Keep blinds or curtains closed during the day and open windows at night.
• If you do not have window coverings, hang a light-coloured sheet or towel to help block sunlight and reduce indoor heat.
• Sleep on a lower level of your home if possible, since hot air rises.
• Use fans wisely and cool only the rooms you need. Ceiling fans should rotate counter-clockwise in the summer to push cool air down.
• Turn off electronics when not in use, as they give off heat.
• Soak your feet in cool water for a few minutes.
• Cook during cooler parts of the day or prepare meals outdoors to avoid heating your home.

Protect your pets

• Walk pets in shaded areas during cooler times of day.
• Keep walks short and avoid hot pavement, which can burn paws.
• Never leave pets in a parked car, even for a short time.
• Provide plenty of fresh water and watch for signs of heat stress.
• Avoid extended periods outside or high levels of outdoor activity during extreme heat.

Plan ahead during heat events

Stay up to date with local weather reports so you can prepare for heat waves. Information about heat-related illness is available on the Peel Public Health website.

• Follow local weather reports and heat warnings.
• Monitor alerts from Environment and Climate Change Canada.
• Keep your home emergency preparedness kit up to date.
• Make sure you have enough medication on hand, as some conditions can worsen in higher temperatures.
• Know the symptoms of heat exhaustion and heat stroke and seek medical attention if symptoms do not improve.
• Check your vehicle’s tires, fluid levels, battery and air conditioning during hot weather.
• Never leave children or pets in your vehicle during high temperatures.
• Consider long-term home cooling options, such as thermal windows, added insulation, external shading and planting trees for natural shade.

Stay cool, stay hydrated and check in on others.