The sun, our friend, but also our enemy:

Sun protection: Don't forget sunscreen, hats and sunglasses. Ultraviolet can be dangerous, causing burns and even skin cancer.
Drink more water: We lose more fluids in the heat, so it's important to keep your body hydrated at all times.
Eat right: Eating light meals rich in fruits and vegetables will help you stay alert and full of energy.
Active recreation - in moderation:

Physical activity: Don't overload yourself with intense exercise in the heat of the day.
Breaks: Take frequent breaks and rest in the shade to avoid overheating.
Take care of your feet: Wear comfortable shoes to avoid fatigue and swelling.
Don't forget to take care of yourself:

Get enough sleep: Sleep is important any time of the year, but in the summer especially.
Reduce stress: Rest and relaxation will help keep you healthy and in a good mood.
Be safe and enjoy your summer!