Japan experienced its first cruelly hot day with temperature climbing past 40C (104F). It is also described as ‘kokushobi’, which is used on days when temperatures reach 40C, with the aim of more effectively warning the public about dangerous heat.

According to the BBC, On Tuesday, temperatures in three central Japanese cities - Tajimi, Gujo, and Toyoda - hit that threshold. The heat is expected to continue into next week, said Japan’s Meteorological Agency (JMA).

Last year, Japan saw its highest-ever temperature of 41.8C in the city of Isesaki.

People are requested to use ACs, drink enough water and avoid outdoor activities. 

The Tokyo Fire Department said a total of 287 people, aged three to 103, were taken to the city’s hospitals on Tuesday because of apparent heatstroke - the highest number recorded this year, said national broadcaster NHK.

As the temperature is rising in Japan, working staffs are also said to wear casual and comfortable clothes for office instead of suit, pants and tie.