Heavy rain caused severe flooding in eastern Japan on Thursday, and television footage showed rescuers airlifting people who were stranded after river embankments collapsed.
The deluge was driven by Tropical Storm Etau, which led to as much as 16 inches of rain in 24 hours in some areas after coming ashore on Wednesday.
However the Fire and Disaster Management Agency announced early Thursday evening that one person was missing, that 21 people were injured and that about 1,000 houses were damaged or flooded. There were no immediate reports of deaths.
Helicopters were used to pull people to safety in Joso, a city north of Tokyo in Ibaraki Prefecture, where levees broke along the Kinu River.
Footage on television showed floodwaters inundating houses and washing away some structures.
The police said about 200 residents were awaiting rescue and nearly 80 were rescued, according to the Kyodo News agency. Eight students and 10 teachers from a kindergarten were later rescued by firefighters in boats, the authorities said.
Evacuation advisories and directives were issued to about 960,000 people in the Kanto region of central Honshu island, which includes Chiba, Ibaraki and Tochigi Prefectures and Tokyo.
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