Story highlights Heavy flooding has left 15 missing as well as seven dead

Residents in affected areas rescued from rooftops

Joso, Japan (CNN) Japan advised almost 3 million people to evacuate after heavy flooding killed seven people and left at least 15 missing in the eastern region of the country.

At least 27 people have been injured across 10 prefectures since floods inundated parts of eastern Japan after a tropical storm, the Fire and Disaster Management Agency said.

Rescue operations continued in the city of Joso, one of the worst-hit areas, although floodwaters are receding, it added.

A total of 2.8 million have been advised to evacuate, the agency said.

Photos: Heavy floods cause havoc in Japan A military helicopter prepares to land on the roof of an apartment building during a rescue mission in the city of Joso in Ibaraki prefecture on Saturday, September 12. Hide Caption 1 of 12 Photos: Heavy floods cause havoc in Japan Men walk along a flooded road near Joso City, Japan on September 12. Hide Caption 2 of 12 Photos: Heavy floods cause havoc in Japan People paddle a boat on a flooded road in Joso, Japan, on Friday, September 11. The sun came out a day after floods washed away houses and forced people to rooftops waiting for rescue. Hide Caption 3 of 12 Photos: Heavy floods cause havoc in Japan A truck and a house are damaged in Joso on September 11. Hide Caption 4 of 12 Photos: Heavy floods cause havoc in Japan A man wades through a flooded street in Oyama, Japan, on Thursday, September 10, after heavy rain pounded the region for two straight days. Hide Caption 5 of 12 Photos: Heavy floods cause havoc in Japan Floodwaters fill streets in the town of Koshigaya, near Tokyo, on September 10. Hide Caption 6 of 12 Photos: Heavy floods cause havoc in Japan Rescue workers transport evacuees through the streets of Oyama on September 10. Hide Caption 7 of 12 Photos: Heavy floods cause havoc in Japan People wait to be rescued as houses are submerged in Joso on September 10. Hide Caption 8 of 12 Photos: Heavy floods cause havoc in Japan A car makes its way through a flooded street in Oyama on September 10. Hide Caption 9 of 12 Photos: Heavy floods cause havoc in Japan People and dogs wait for rescuers in Joso on September 10. Hide Caption 10 of 12 Photos: Heavy floods cause havoc in Japan A hotel building plunges into floodwaters at a mountain resort in Nikko, Japan, on September 10. Hide Caption 11 of 12 Photos: Heavy floods cause havoc in Japan People await help while vehicles are overturned and submerged in Joso on September 10. Hide Caption 12 of 12

In Miyagi prefecture, there were two deaths, including a woman found dead in her floating car. In Tochigi prefecture, north of the capital, Tokyo, three deaths were reported. Two more bodies were later found in Ibaraki prefecture, according to police.

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