Tokyo experienced a record 10 consecutive days of temperatures 35 degrees Celsius or above, the weather office said Wednesday, after the country sweltered through its hottest-ever June and July.

Heat waves are becoming more intense and frequent worldwide because of human-caused climate change, scientists say, and Japan is no exception.

This "is the first time since the survey started" in 1875 that such a run has been recorded, the Meteorological Agency said, adding that Wednesday marked the 10th day of the heat streak.