The Fire and Disaster Management Agency said Wednesday that 18,573 people were taken to hospital to be treated for heatstroke in August.
The agency said the figure, the second highest number in recorded history, was a 5.7% increase on last year, Fuji TV reported. It added that of those 18,573 people, 35 died.
The figure is second to only 2010, when 28,448 people were taken to hospital suffering from heatstroke. Agency records began in 2008.
According to the agency, the high number of casualties is believed to be due to the fact that a large area of northwestern Japan saw temperatures remain above 35 degrees throughout most of August.
The agency also reported that people over the age of 65 constituted around half of the total number, at 46.3%. That age range is thought to represent around 24% of the total population of Japan.
The figures show that the highest number of heatstroke cases occurred in Tokyo, which saw 1,422 hospitalized. The second highest was Saitama with 1,131, followed by Osaka with 1,114.© Japan Today