Mapping Shade and Surface Temperatures at School
A safe, practical guide to mapping shade, surface temperatures and accessible cool spots in a schoolyard.
Why map heat in a schoolyard?
Sunlit pavement, soil beneath a tree and a shaded bench can feel very different. Surface temperature is not air temperature; record which quantity you measured and when. The purpose is not to expose pupils to heat but to identify cooler, accessible places through supervised observations.
Start with safety
Work with school approval and teacher supervision. Cancel outdoor measurements during extreme-heat warnings. Provide water, hats and breaks, and never ask pupils to touch hot surfaces. Follow infrared thermometer instructions and never point the device at eyes. Avoid collecting children's faces or precise personal location data.
Choose comparable locations
Select at least six points: sunny pavement, shaded pavement, exposed soil, beneath a tree, building shade and an accessible seating area. Record material, shade type and time. Measure air temperature separately with an appropriately shielded thermometer in shade; do not mix it with surface readings.
Understand measurement limitations
Infrared readings depend on emissivity, distance and viewing angle; reflective metal can be misleading. Use the same instrument, distance and angle, with repeated readings. Without an instrument, do not invent numbers: create a qualitative map of sun, shade, materials and comfort instead.
A five-day activity
Day one: select sites and accessible routes. Day two: take baseline readings at a consistent time. Day three: compare safely at another time. Day four: turn observations into a table and simple colour-coded map. Day five: discuss modest improvements such as seating, drinking-water access or shade with school staff.
Interpret evidence carefully
One day's observations do not establish a climate trend. Clouds, wind, humidity and timing matter. Avoid labelling one spot categorically dangerous from a single reading. When comparing days, use consistent methods and report uncertainty.
Make cool spaces accessible
Show wheelchair-accessible routes, seats, drinking-water points and how long shade lasts. Tree-planting proposals need maintenance, local climate and infrastructure assessment. Any temporary shade structure needs professional wind and structural safety review.
Share a useful outcome
Publish a one-page summary with methods, dates, number of sites, limitations and three realistic recommendations. Explore related sustainability topics in the e-NetCoM guide. Sources: US EPA Heat Islands (https://www.epa.gov/heatislands); WHO Heat and health (https://www.who.int/news-room/fact-sheets/detail/climate-change-heat-and-health).