Five households in the immediate vicinity of a massive, ever-widening sinkhole near Tokyo were urged to evacuate Sunday, with efforts to rescue a man stuck inside reportedly halted.
A 74-year-old truck driver plunged his vehicle into the cavity on Tuesday, which has since expanded to 40 meters across — almost the length of an Olympic swimming pool.
The growing hole could be the result of corroded sewerage pipes, according to local authorities.
Requests were issued Sunday for five households near the hole in the city of Yashio, Saitama Prefecture, to take shelter, a local government official said.
This is on top of other residents within a 50-meter radius of the cavity who are also being encouraged to evacuate, he added.
On Saturday, Japanese rescuers completed building a 30-meter slope to send heavy equipment and reach the truck driver.
But a good amount of sewage water was discovered underneath the slope, which, combined with rain, led to the rescue mission being suspended Sunday, public broadcaster NHK said.
With the walls of the hole — around 15 meters deep, according to NHK — eroding, rescue workers are unable to stay inside it for long.
The hole was initially around five meters in diameter but combined with a larger cavity that opened during the rescue operation on Tuesday night.
Around 1.2 million people living nearby have so far been asked to cut back on showers and laundry to prevent leaking sewage from hindering the operation.
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