Japanese cities are experiencing "cruelly hot days", a new meteorological term devised this year to warn people of intense heat above 40C, with heatstroke alerts issued across almost the whole country.

Authorities urged residents to use air conditioning liberally, hydrate regularly and avoid spending long hours outdoors.

Japanese cities are experiencing "cruelly hot days", a new meteorological term devised this year to warn people of intense heat above 40C, with heatstroke alerts issued across…

Authorities issue heatstroke warnings in more than 40 of archipelago nation’s 47 prefectures