Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: More than 100,000 people have been evacuated and thousands of properties destroyed, after rare torrential rains saw a major river burst its banks north of Tokyo in Japan on Thursday. A further 800,000 people across eastern Japan have been advised to evacuate after officials issued pre-dawn warnings of unusually harsh rainfall to 5 million people. Dramatic footage shows people being plucked from their homes minutes before a tsunami-like wall of muddy water gushing from the Kinugawa river in Joso, carry their houses downstream. So far, two people have been reported missing: a man in his 70s and a 63-year old woman, both in Joso, which is home to some 65,000 people, as a wide area was deluged in the wake of Typhoon Etau.Tropical typhoon rain in Japan has seen the Kinugawa river, 30 miles north of Tokyo burst its banksThousands of people have had to be evacuated and hundreds of homes have been destroyed overnightHuge rains have also affected the nearby Fukushima nuclear plant, sending radiation water into the ocean 
 Question:In _, houses and vehicles were washed away along with some power lines, as military personnel headed to the area to help with the rescue mission.

Joso