Yesterday, it was very hot. Kumamoto City and Yamaga registered a temperature of 35.7 C (96 F). In Japan, a day when the temperature rises to 35 C or higher is considered to be a “scorcher” (moshobi; 猛暑日). Yesterday was Japan’s first “moshobi” day of the season and Kumamoto and Saga share the distinction of being the first to enter that range this year. :(

As I wrote earlier, we also made national news for the torrential rain (ゲリラ豪雨; literally “guerrilla rainstorm”) that hit the northern part of the city in the afternoon. I think it must be quite unusual for Kumamoto to make the national news for extreme heat and extreme rain in the same day.

The typhoon to our south has been blowing up lots of hot air from from areas closer to the equator. This seems to be what led to the unusual combination of high temperatures and then heavy rain.

http://www3.nhk.or.jp/news/html/20150709/k10010144601000.html