If it turns into heat stroke it needs to be treated as an emergency. How to to stay away from common heat-related illnesses?

Vietnam northern and central regions are expected to endure another hot period due to start from June 18 with temperatures climbing to over 37 degrees Celsius and ultraviolet UV levels posing threats to human health. 

As the temperature is getting high in the summer, various health problems will arise, for instance, heat exhaustion.It is not serious and usually gets better when you cool down. If it turns into heat stroke it needs to be treated as an emergency.