Dozens of families have spent a second night away from home as experts try to dismantle a World War II bomb.
Experts have built a defensive wall around the device
Builders uncovered the 500lb (226kg) device at a site off Palmers Road in Bethnal Green on Monday evening.
A cordon is in place and a defensive wall has been built around the area but the bomb disposal team said it could still shatter windows if it explodes.
Up to 50 people were advised to leave properties on Monday and it is unclear when they will be able to return.
Capt Jon Ballard, of the bomb disposal team, explained what the team was doing.
"This munition we are dealing with is about a metre-and-a-half long and we are going to cut one or maybe two holes in it, if we can get round to it," he said.
"Depending on the type of explosive we find in there we will either flush it out using a hose or we will try to steam it out... and remove the explosive chain."
Roman Road remains closed to traffic and motorists are advised to avoid the area.
Anyone affected by the incident is advised to contact Tower Hamlets Council on the emergency telephone number: 020 7364 5020.