Consuming too much caffeine can cause dehydration. Stick to having plain water or coconut water during the heatwave.
Another diuretic drink that should be avoided during the summer is alcohol. It can make you extremely dehydrated.
Another thing to avoid having in the summer is red meat. They require more energy to digest and can increase body temperature.
Avoid having chillies and spicy food in summer as they can increase your body temperature.
Salty snacks like chips and nuts should be avoided in excess.
Fried items like chicken wings and french fries should be avoided as they can be difficult to digest.
Dishes with rich, creamy sauces or heavy creams can be difficult to digest and can increase your body temperature.