Be careful of Heatstroke!

When wearing a face mask to prevent COVID-19 infections, it is more important than usual to drink plenty of water because heat tends to build up inside the body and it is difficult to notice thirst. Also, avoid strenuous exercise when wearing a face mask, as it increases the risk of heatstroke. If you are outdoors and can maintain a sufficient distance (at least 2 meters) from people, remove your mask.

About heatstroke alert

The Heatstroke alert is issued by the Ministry of the Environment (MoE) and the Japan Meteorological Agency (JMA) to raise awareness of heat stroke prevention. 
Please refer to the alert level for your information.

What is heatstroke?

Heatstroke appears by losing balance between moisture and salinity of the body in high temperature and high humidity circumstances.  It is important for you to avoid heat not only outdoors but also indoors.


  • Dizziness, Muscle Pain, Cramp, 
  • Sweating profusely, High Body Temperature,
  • Headache, Nausea, Vomiting, Exhaustion, Despondency,
  • Disturbance of Consciousness, Spasm, Limb movement disorder

Be careful if you have any of the following conditions.

Elderly people, infants, people with chronic diseases, people in poor health, and obese people.

Prevention Points

  • Take water and salt frequently, even if you are not thirsty. 
  • Wear a hat or a cap, or use a parasol, and dress in clothes that will keep you cool.  
  • Take a rest frequently under the shade. 
  • Do not hard work and let your body adjust gradually.
  • Use fans and/or air conditioners for temperature control
  • Do not overdo it if you are not feeling well.

First aid in case of heatstroke

Conscious condition:

1. Move the body to a cooler place.

2. Remove the patient’s clothes and cool the body.

3. Supply water and salt.  

4. Go to a medical institution as soon as possible if symptoms are not improved. 

Unconscious condition:

1. Call an ambulance.

2. Move the body to a cooler place.

3. Remove the patient’s clothes and cool the body.

4. Go to a medical institution

Contact Information

Health Promotion Division
Phone: 0276-62-2121
Counter: The 1st counter of Health & Welfare General Center