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Schools & Child Care


This section contains information on outdoor environmental conditions that can impact student health and safety and provides additional resources to assist you with providing safe and enjoyable activities for students.

Outdoor activities during extreme temperatures

It is important to consider the weather when planning outdoor activities. Environment and Climate Change Canada (ECCC) issues weather alerts, which include watches, warnings and statements. When heat or extreme cold warnings are issued by ECCC, we communicate health risks associated with exposure to hot and cold temperatures, so children can be protected against extreme temperatures. When making decisions about outdoor breaks, instructional time and/or field trips during extreme temperatures consider the information below.

Within our region, a heat warning will be issued by ECCC when either daytime maximum temperatures are expected to reach 31°C or warmer and nighttime temperatures fall to 20°C or warmer; or humidex values are expected to reach 40°C or higher for tow consecutive days. Extreme heat events can put people’s health at risk. When exposed to extreme heat, the body’s temperature control system can become overwhelmed and core temperature can increase. Sweating helps cool the body, however, when the humidity is high, sweat will not evaporate as quickly. This will prevent the body from releasing heat quickly and high core temperatures can damage the brain or other vital organs. Exposure to extreme heat can result in heat related illnesses such as heat rash, cramps, exhaustion, stroke and fainting.

Everyone is susceptible to the effects of extreme heat, but children are especially vulnerable. Children have a high metabolic rate and produce more heat during physical activity. Their capacity to sweat is not as great compared to adults, so it is more difficult for them to release heat from their bodies. Also, the effects of dehydration are greater in children and they rely on others to provide adequate fluids for hydration. Children with diabetes, anorexia, obesity, developmental delays, cystic fibrosis, heart disease and diarrhea are at even greater risk of acquiring a heat related illness and need frequent monitoring.
To help prevent negative health impacts from extreme heat events, ensure children:

  • Drink plenty of fluids (even more than their thirst indicates)
  • Avoid caffeine or beverages with large amounts of sugar
  • Wear lightweight and loose-fitting clothing
  • Keep physical activity to a minimum
  • Stay cool indoors and in an air conditioned place if possible
  • Are in classrooms with the blinds/curtains drawn to prevent radiant heat from entering the room and fans to increase evaporation (when conditions are extreme, fans will not prevent heat related illness)
  • Wear a wide-brimmed hat, sunglasses and sun screen when outdoors
  • Seek medical care if they have symptoms of a heat related illness.

Within our region ECCC issues extreme cold warnings when the temperature or wind chill falls to minus 30°C for at least two hours (Simcoe County) or minus 35°C for at least two hours (District of Muskoka). When winter temperatures drop to very low temperatures, staying warm and safe can become a challenge. Exposure to cold temperatures can result in cold related illnesses such as frostnip, frostbite, hypothermia and winter asthma. Cold related illnesses occur when the body loses heat faster than it can maintain it. Children are at greater risk for cold related illnesses because they are not able to regulate their internal body temperatures as well as adults.
To avoid cold related illness, ensure children:

  • Stay indoors if the temperature or wind chill falls below minus 27°C (Canadian Pediatric Society, 2017), dress warmly and cover exposed skin
  • Wear several layers of loose fitting clothing
  • Wear winter hats, mittens and scarves
  • Stay dry, wet clothing chills the body rapidly. Excess sweating will also increase heat loss, so extra layers of clothing should be removed when children are too warm
  • Drink warm fluids
  • Keep moving, limit time sitting
  • Take shelter from the wind to reduce wind chill exposure
  • Are alert to signs of frostbite and hypothermia.
Children are more susceptible to the effects of air pollution because their immune systems are less developed, they breathe in more air, have faster breathing rates than adults and they tend to breathe through their mouths which by-passes the natural filtering system of their nose. Poor air quality can cause irritation of the eyes, nose and throat can also cause breathing difficulties.
  • The Air Quality Health Index (AQHI) is a scale between 1 - 10 that helps us understand if the outdoor air will impact our health and outdoor activities. It also provides suggestions on how activities could be adjusted based on the AQHI reading and category. The higher the AQHI, the poorer the air quality. The Ministry of the Environment, Conservation and Parks may issue one of two air quality alerts: Special Air Quality Statements (SAQS) or Smog and Air Health Advisories (SAHA) when air quality is poor.
  • For educators: Let Indi the Caterpillar teach your students about the Air Quality Health Index (AQHI) in this 3-minute video geared towards younger children.
Smog is the most visible form of air pollution. It is a brownish yellow hazy cloud caused when heat and sunlight react with various pollutants. Smog can be a year round problem but most alerts and watches occur on hot days. Smog can increase children’s risk of getting sick because it reduces their respiratory system’s ability to fight infection and remove foreign particles. It can also worsen the effects of asthma and allergies for children.

Idling cars release exhaust that is harmful to the environment and the health of students, school staff, and our local communities. Unnecessary idling of vehicles contributes to poor air quality, climate change and can be a risk to health. A vehicle’s exhaust contains particulate matter, VOCs, nitrogen oxides, carbon monoxide and carbon dioxide. These are all considered pollutants and affect the air we breathe. Children are susceptible to the negative effects of idling cars because their lungs are still developing and they breathe in air at a faster rate than adults. The pollutants created from unnecessary idling can lead to:

  • Lung infections and irritation, asthma, bronchitis, emphysema
  • Some forms of heart disease
  • Increased risk of cancers, and
  • Reduced ability of the blood to carry oxygen in the body.

Reducing unnecessary idling of cars will reduce pollutants, improve air quality and our health. Some ways you can reduce or eliminate idling and its effects include:

  • During drop off and pick up times, close windows that may be near these areas.
  • Create an idle control program or policy. This will help educate parents, caregivers and staff about the importance of reducing idling and need to change behaviours.
  • Encourage parents, caregivers, school visitors and staff to turn off their vehicle during pick up and drop off times.
  • Support active school travel (such as walking or cycling) as it helps to protect student safety by decreasing vehicle traffic, while promoting the many benefits of healthy active living.

A number of municipalities within Simcoe-Muskoka have idling by-laws in place. Please check with your local municipality to see if they have an idling by-law. For more information on Idle-Free zones refer to National Resources Canada.

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