Japan joined many parts of the Northern Hemisphere in seeing an unusually hot summer. Meteorologists say 17 nations have recorded all-time-high temperatures this year, more than in any other year, and scientists have said that July was the hottest month on record for the world's oceans.
Across Japan, temperatures soared higher than historical averages by 2.96 degrees Fahrenheit (1.64 degrees Celsius) from June through August, the highest since 1898 when records began, according to the Japan Meteorological Agency.
That's higher than the previous record set in the summer of 1994. In Tokyo, temperatures have climbed as high as 99 degrees Fahrenheit (37 Celsius).
Soaring temperatures sent more than 46,000 people to the hospital this summer, the Fire and Disaster Management Agency said. Some 150 people died from heat stroke.
The heat, however, has been good for the economy. A government report this week showed that retail sales rose 3.9 percent from a year earlier, as consumers bought cold drinks, summer clothing and cooling products.
Weather officials attributed the jump to global warming and a particularly strong high-pressure system in the Pacific Ocean. The nationwide average is based on temperatures recorded at 17 locations around the country.
To judge the average temperature for the country, the Japan Meteorolgical Agency compares average temperatures to the 30-year average from 1971 and 2000 in each location.
The temperatures track a global pattern of extreme heat this summer.
In Russia, a heat wave unprecedented in 130 years of record-keeping triggered thousands of wildfires, while a surge in temperatures across much of Europe caused crops to wither and roads to melt.
Figures released in the U.S. show record summer heat for many cities across the northeastern part of the country. In early August, scorching temperatures and high humidity prompted heat advisories for 18 states.