Onions have a high water content which can help you stay hydrated during a heatwave by maintaining body temperature.
Onions contain antioxidants which can help protect your body from oxidative stress caused by excessive heat.
Onions are a good source of potassium, essential for maintaining electrolyte balance in the body.
Onions may have a natural cooling effect on the body and eating raw onions can make one feel cooler in hot weather.
Onions contain dietary fibre that aids digestion. Good digestion during a heatwave ensures your body maintains energy levels.