on Tuesday, a dominant high-pressure system fueled the dramatic temperature spikes nationwide. Fukuchiyama City in Kyoto Prefecture recorded a scorching 39 degrees celsius, while Date City in Fukushima Prefecture reached 38.6 degrees, and Daigo Town in Ibaraki Prefecture registered 38.5 degrees. Notably, eastern Hokkaido experienced temperatures more than 10 degrees above average for this time of year.

Looking ahead to Wednesday, Hokkaido is bracing for further extreme heat. Weather officials predict daytime highs of 39 degrees in Kitami City, 38 degrees in Obihiro City, and 37 degrees in Mombetsu City. In some areas of Kitami City, temperatures could approach a life-threatening 40 degrees Celsius.

The intense heat is not confined to the north. Hita City in Oita Prefecture is expected to reach 39 degrees Celsius, while Kumagaya City in Saitama Prefecture anticipates a high of 38 degrees.

In response to the perilous conditions, heatstroke alerts have been issued across the archipelago, extending from Hokkaido down to Kyushu in the southwest. Authorities are strongly advising residents to utilize air conditioning, maintain adequate hydration with water and electrolytes, and to schedule frequent breaks during any outdoor activities.

Adding to the concerns, weather officials have noted that atmospheric conditions are becoming increasingly unstable, especially in inland eastern Japan. This instability is attributed to the combination of the extreme heat and an approaching cold air mass.

Consequently, there is a possibility of heavy rainfall, primarily in eastern Japan, on Tuesday night and Wednesday. Residents are urged to exercise caution regarding potential flooding,landslides,swollen rivers,lightning strikes,strong gusts,and hail.