University of Sydney researchers reveal the real impact of heat on focus, mood, and productivity, plus simple ways to stay cool on campus.
Australian summers are getting hotter, and that heat affects more than just comfort. Studies from the University of Sydney’s Heat and Health Research Centre (HHRC) show that high temperatures can slow thinking, reduce energy, and even impact mood, all things that matter when you’re juggling lectures, assignments, and exams.
“Even mild heat can make it harder to concentrate or complete tasks efficiently,” says Professor Ollie Jay, HHRC Director. “Your body is working overtime to cool itself, which leaves less energy for your brain.”
PhD student Megan Tiong (BAppSc(ExPhys)(Hons) ‘23) points out the hidden ways heat affects student life. “We often find it difficult to sleep during hot weather, and that can really impact cognitive performance and concentration,” she says. “Being aware of this and planning ahead by hydrating and knowing where the cool spots are on campus can make a big difference.”
Megan has helped bust some persistent myths about heat and staying cool.
Myth: Air-conditioning is always the best way to stay cool.
Fact: It’s tempting to seek out air-conditioning on a hot day, but for those of us without at-home AC, Megan confirms that the humble fan, combined with skin-wetting work just as well. Plus, they use far less energy. Bonus!
Myth: Heat only affects the very old or the very young.
Fact: While heat can pose big health risks for babies and the elderly, young adults feel the heat too. Heat can cause sluggish thinking, irritability or dehydration, all of which can seriously impact your summer days. Megan recommends planning ahead and knowing where to find a spot to cool down when the heat gets too much.
Shaded spots on campus, like the Vice Chancellor Garden, are a great way to beat the heat while still enjoying the outdoors.
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LinkKitchenettes on campus aren't just for microwaving your lunch; they have filtered cold water on tap (and who could forget air conditioning).
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LinkMyth: You've got to tough it out.
Fact: You won’t win any prizes for slogging it out in the sun! Megan recommends using small, evidence-based strategies, like hydrating, planning your day, or finding cool spaces. The combined effects will vastly improve your well-being on hot days and give you more staying power in the long run.
“There’s no one-size-fits-all solution,” she says. “But if there’s one thing I’d tell my fellow students, it’s this: use a fan. It’s far better for the environment than air conditioning, and if you pair it with strategies like skin-wetting, it works just as well.”