Extreme rainfall hit northern Kyushu on the night of June 28 through the morning of June 29, putting the region on high alert for landslides and floods, as well as affecting the railway network.

The Fukuoka Regional Headquarters of the Japan Meteorological Agency issued a landslide warning to Fukuoka, Saga, Nagasaki and Kumamoto prefectures, which acts as a guide for municipal governments to issue evacuation orders or warnings.

The torrential downpour was caused by the combination of a stagnant seasonal rain front over the southern Korean Peninsula and humid air coming up from the south.

The rain is expected to continue until the evening of June 29.

About 110 millimeters of rain fell around Kawasaki, Fukuoka Prefecture, in one hour between 6 a.m. and 7 a.m. on June 29, according to weather radar analysis and rain gauge measurements by the headquarters.

Minami-Shimabara, Nagasaki Prefecture, also received about 110 millimeters of rain between 9 a.m. and 10 a.m. on the same day.

Yukuhashi, Fukuoka Prefecture, recorded 107 millimeters of rain in three hours through 7:40 a.m., breaking the city’s previous record from 1976.

The rain fell to a degree that would normally occur only once every few years in northern Kyushu, but the current deluge comes less than a year after torrential rain in July 2017 devastated mountainous areas in the region.