Japanese weather officials say they believe the rainy season has ended in Tokyo and other parts of the Kanto-Koshin region. They say the mercury soared above 35 degrees Celsius in many cities to mark the hottest day of the year yet.
A high pressure system hovered over wide areas between northern and western Japan on Monday.
As of 4:00 p.m., Ibigawa Town in Gifu Prefecture, central Japan, marked the highest temperature of 37.2 degrees Celsius, followed by Kamaishi City, Iwate Prefecture, northern Japan, at 37 degrees. Toyooka City, Hyogo Prefecture and Kyoto City, both in western Japan, marked 36.6 and 36.5 degrees respectively, while central Tokyo marked a high of 33.7 degrees. These figures are the highest for this year.
Weather officials warn a heat wave is expected to prevail for the next seven days. They are also calling on residents to take caution against heatstroke, such as drinking liquids frequently and using air conditioners.
Meanwhile, rising temperatures and damp air are destabilizing atmospheric conditions over wide areas and causing sporadic downpours.
Officials are warning against mudslides, flooding in low-lying areas as well as sudden changes in weather, resulting in lightning strikes and gusty winds.