A rescue worker helps local residents at a flooded area caused by a heavy rain along Kuma River in Hitoyoshi, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 4, 2020. Mandatory credit Kyodo/via REUTERS

Japanese Self-Defence Force soldiers carry rescured person using a stretcher at a flooding site caused by a heavy rain in Kuma village, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 5, 2020. Mandatory credit Kyodo/via REUTERS

People rest at a temporary evacuation center in Hitoyoshi, Kumamoto Prefecture, southwestern Japan, after torrential rain, in this photo taken by Kyodo, July 6, 2020. Mandatory credit Kyodo/via REUTERS

Local residents practice social distancing amid the coronavirus disease (COVID-19) outbreak as they rest in the evacuation centre for the affected by the flooded area caused by heavy rain along Kuma River in Hitoyoshi, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 4, 2020. Mandatory credit Kyodo/via REUTERS

Photo shows the swollen Kuma River in the flood-ravaged city of Hitoyoshi in Kumamoto Prefecture, southwestern Japan, after deadly torrential rain, in this photo taken by Kyodo, July 6, 2020. Mandatory credit Kyodo/via REUTERS

Rising water caused by a heavy rain is seen along Kuma river in Yatsushiro, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 4, 2020. Mandatory credit Kyodo/via REUTERS

An aerial view shows flooded Kuma River caused by heavy rain at a residential area in Hitoyoshi, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 4, 2020. Mandatory credit Kyodo/via REUTERS

An aerial view shows the words "Rice, Water, SOS" spelled out on the ground in the flood-ravaged Kuma village, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 5, 2020. Mandatory credit Kyodo/via REUTERS

An evacuee is helped by rescue workers as she moves from a shelter to another shelter in Kuma town, Kumamoto Prefecture, southwestern Japan in this photo taken by Kyodo, on July 6, 2020. Mandatory credit Kyodo/via REUTERS

Rising water caused by a heavy rain is seen along Kuma river in Yatsushiro, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 4, 2020. Mandatory credit Kyodo/via REUTERS

Police officers search for missing people at a landslide site caused by a heavy rain in Tsunagi town, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 5, 2020. Mandatory credit Kyodo/via REUTERS

Rescue workers search for missing people at a landslide site caused by torrential rain in Tsunagi town, Kumamoto Prefecture, southwestern Japan in this photo taken by Kyodo, on July 6, 2020. Mandatory credit Kyodo/via REUTERS

A car is pictured after it was drifted by torrential rain in Hitoyoshi, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 6, 2020. Mandatory credit Kyodo/via REUTERS

A couple looks around at the site of their parents' house which was damaged by torrential rain in Kuma town, Kumamoto Prefecture, southwestern Japan in this photo taken by Kyodo, on July 6, 2020. Mandatory credit Kyodo/via REUTERS

An aerial view shows flooded Kuma River caused by a heavy rain at a residential area in Hitoyoshi, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 4, 2020. Mandatory credit Kyodo/via REUTERS

Rescue workers search for missing people at a landslide site caused by torrential rain in Tsunagi town, Kumamoto Prefecture, southwestern Japan in this photo taken by Kyodo, on July 6, 2020. Mandatory credit Kyodo/via REUTERS

Police officers search for residents stuck in a flooded area caused by a heavy rain along Kuma River in Hitoyoshi, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 4, 2020. Mandatory credit Kyodo/via REUTERS

Local residents are rescued by Japanese Self-Defence Force soldiers using a boat at a flooding area caused by a heavy rain in Kuma village, Kumamoto prefecture, southern Japan, in this photo taken by Kyodo July 5, 2020. Mandatory credit Kyodo/via REUTERS

People watch the swollen Kuma River after torrential rain in Kuma town, Kumamoto Prefecture, southwestern Japan in this photo taken by Kyodo, on July 6, 2020. Mandatory credit Kyodo/via REUTERS