© KyodoA sinkhole at an intersection near Tokyo that swallowed a truck collapsed further Thursday andas rescue efforts continued into a third day to save the driver.The sinkhole in Yashio, Saitama Prefecture, has expanded to roughly 40 meters wide and up to 15 meters deep since first appearing on Tuesday, according to local fire authorities. The duration of the operation is undetermined, authorities said.The discharging of wastewater is unusual, having been carried out on occasions such as the aftermath of the 2011 earthquake and tsunami that devastated northeastern Japan.Some 1.2 million residents in a total of 12 cities and towns in the prefecture have been urged to refrain from using the sewage system since Tuesday, according to the prefectural government. "It is inconvenient as the road has been closed for three days," an 83-year-old man who lives near the site said. "I also do not know how much I should refrain from using the sewage system. "Local authorities have called on residents within a 200-meter radius of the area to evacuate, with around 20 people sheltering in a nearby middle school as of Thursday morning.