How extreme heat disrupts your brain's ability to think clearly

High temperatures can affect how the brain works. According to Prof. Dr. Martin Korte of TU Braunschweig, heat can make it harder to think clearly. This happens because the body focuses on cooling itself instead of other tasks. In hot weather, blood vessels widen and the body produces more sweat. This can lower blood pressure, leaving people feeling tired and slow. Blood flow shifts away from the brain to help cool the skin, which weakens concentration.

Heat discomfort also takes up space in the brain’s working memory. This distraction makes tasks feel more difficult. Symptoms like dizziness, confusion, or headaches can appear if the body overheats.

To stay sharp, cooling strategies can help. Rinsing with cool water, staying in the shade, or planning activities for cooler times of day are effective. Taking breaks and avoiding heavy tasks during peak heat also maintains focus. Staying hydrated is essential, with water, unsweetened tea, or diluted juices as good options. Broth can replace salts lost through heavy sweating.

Vulnerable groups should take extra care. Older adults, children, pregnant people, and those with health conditions need to be especially cautious during heatwaves. The article first appeared in 2022 and has since been reviewed and updated. It highlights practical ways to protect cognitive function in hot weather. These steps can reduce the risk of heat-related problems while keeping the mind alert.