Who doesn’t love the start of summer? Longer days, time outside, vacation plans, and drinks on the patio — what’s not to like? But alongside all the good comes something a little sneakier: the summer sizzle.
The Surprising Impact of Heat on Your Brain
As temperature rises, your body puts more energy into regulating internal temperature — and that energy has to come from somewhere. When your brain is busy helping the rest of your body cool down, there’s less bandwidth for thinking clearly, reacting quickly, or staying emotionally regulated.
You might feel more easily overwhelmed, groggy, or tense without realizing it’s connected to the heat. Some common effects include:
Slower reaction times
Reduced focus and decision-making ability
Increased stress and irritability
Disrupted sleep, which can exacerbate everything else
In extreme cases, these effects can have serious consequences, especially if you’re driving, working, or exercising in the heat.
How to Keep Your Brain Cool (Literally and Mentally)
The good news: staying sharp in the summer doesn’t require a total life overhaul — just a few thoughtful adjustments.
Here are a few ways to protect your brain when the weather heats up:
Stay hydrated. Water helps regulate body temperature and keeps your brain functioning properly.
Find ways to cool down. Cool showers, damp towels, fans, and shade all go a long way.
Dress smart. Choose loose-fitting, light-coloured clothing to help your body breathe.
Avoid intense activity during peak heat. Save workouts or errands for earlier or later in the day.
Keep your brain active. Light mental challenges — like puzzles or games — help keep your mind sharp without overstimulation.
Prioritize sleep. Make your sleep space as cool and dark as possible to support deep rest.
Watch for warning signs. Headaches, dizziness, or nausea can be signs that your body needs a break.
Support Your Brain from the Inside Out
Some healthy habits support brain health year-round, but they’re especially helpful during hot spells:
Eat for your brain. Choose foods that support blood flow and hydration — like berries, bananas, yogurt, nuts, and granola.
Check in with yourself. Notice changes in mood, energy, or physical symptoms. Heat stress often builds gradually.
Take breaks. If you’re outside or in a warm space for long periods, give your body regular time to cool off.
Summer is meant to be enjoyed — and you can do that more easily when your mind and body feel balanced. With a little care, you can keep your brain calm, clear, and resilient all season long.
