Torrential rain in southwestern Japan has left three people dead and one missing, while more than 1,900 people were staying at evacuation centers as of Thursday morning.

A 96-year-old woman was found dead at a flooded house in Takeo, Saga Prefecture, early Thursday, a day after the rains caused flooding of roads and triggered landslides. The weather agency continued to warn of downpours in Kyushu that could cause further landslides and floods.

The Meteorological Agency also said heavy rainfall accompanied by lightning may hit wide areas from western to northern Japan through Friday.

In Omachi, Saga Prefecture, Juntendo hospital was isolated due to flooding, with 215 people including patients becoming stranded, according to the prefectural government. The prefectural government also said water that contains oil leaking from a nearby plant was flowing into the hospital. It is gathering information on the situation.

On Wednesday, two people were confirmed dead in Saga and Fukuoka prefectures, while one went missing and another remained unconscious in Saga.

More than 1,900 people in five prefectures in the Kyushu region and Honshu's Yamaguchi Prefecture were still staying at evacuation centers as of Thursday morning, the central government said.