Typhoon Etau has dumped more than 2 feet of rain in areas of Eastern Japan since Monday causing unprecedented flooding. Raging waters have torn houses from their foundations, uprooted trees and forced more than 170,000 people from their homes. Those who didn’t leave found their houses submerged within minutes.

Helicopters hovering over swirling, muddy waters rescued 101 people from the roofs of their homes as of Thursday. Seven people are missing and at least 17 were injured, one seriously.

“Tochigi Prefecture is facing a grave danger and is in an emergency situation,” Japan Meteorological Agency Spokesman Takuya Deshimaru said. “It is experiencing unprecedented downpour.”  

The disaster is far from over. Parts of eastern Japan will get another 2-4 inches of rain over the next 36 hours, according to CNN meteorologist Derek Van Dam.

The mountains will help induce more rain and will funnel the precipitation, intensifying flooding and causing an even greater risk of mudslides.