Kanazawa City on the Sea of Japan had record heat on Tuesday due to the effects of Typhoon Hinnamnor that passed near the region.
Japan's Meteorological Agency says that warm and moist air from the typhoon engulfed the coastal region. Officials said that southerly currents blowing down over the mountains turned into hot and dry foehn winds.
The mercury in Sanjo City, Niigata Prefecture, rose to 38.8 degrees Celsius.
Kanazawa City in Ishikawa Prefecture hit 38.5 degrees, tying the record high since data compiling began in 1882.
Thermometers in Kyoto City in western Japan saw 35 degrees.
Daytime highs are expected to be lower on Wednesday in the coastal Hokuriku region and Niigata Prefecture. But severe heat is expected in western Japan, including the Kyushu and Shikoku regions, as well as the Pacific coastal areas of eastern Japan.
Authorities are calling on people to stay hydrated and to use air conditioning when necessary to avoid heatstroke.