The UEFA representative will measure temperatures with a wet bulb globe temperature (WBGT) thermometer at the end of the warm-up of the teams.
Separated from a normal thermometer, the WBGT thermometer eats to determine the heat for temperature, humidity, air speed, sun angle and cloud cover.
If the WBGT temperature is more than 32C, the cooling brake – which can live between 90 seconds and three minutes – will be introduced to the players during the match.
If the temperature is below those thresholds, the implementation of the drink brake is at the discretion of the referee.
A heat warning has been issued by the UEFA for all matches on Wednesday, Thursday and Friday, fans have allowed to bring a bottle of up to half a liter in size to the stadium in those days.
The UEFA has encouraged fans to recreate their bottles and cups in the bathroom of the stadium and to take shade in fan areas across the country.
