Japan baked under scorching temperatures for a fourth successive day on Tuesday, as the capital's heat broke nearly 150-year-old records for June and authorities warned power supply remained tight enough to raise the spectre of cuts.
The heatwave comes less than two weeks before a national election in which prices, including the cost of electricity, are among key issues picked by voters in opinion polls that show the government's approval rating slipping - with politicians including Tokyo's governor urging power price cuts.
