Tokyo temperatures hit 36.8°C amid 'extremely dangerous heat' in Japan

Temperatures in parts of Japan soared to above 35°C on Jun. 17, amid an ongoing heat wave.

The authorities also issued heatstroke alerts for various prefectures, with "extremely dangerous heat expected", a researcher at the Japan Meteorological Agency said on X.

In Hachioji, Tokyo, temperatures hit 36.8°C. It was the first time in the year that the mercury surpassed 35°C in Tokyo.

Even hotter temperatures were recorded in other parts of the country.

In the city of Kofu in Yamanashi prefecture, temperatures hit 38.2°C, according to The Japan Times.

Several people were taken to hospital for suspected heatstroke on the same day with a number of reported deaths, NHK said.

Cause of heat waves

The heat is caused by a high-pressure system stretching across eastern and northern Japan, the authorities said.

It began a week after the start of the rainy season on Jun. 10.

In addition, "extremely unstable atmospheric conditions" have been forecast in eastern Japan after Jun. 18.

This might lead to localised downpours. The authorities have since advised caution against flooding, mudslides, lightning strikes, hail, and tornadoes.

To battle the heat, people have been advised to use air-conditioning as needed and to stay indoors if possible, particularly if they are vulnerable to heatstroke.

Schools, businesses, and event organisers should also take precautions or cancel outdoor activities.

Top image by Ashley Tan