"I won't know that until we've gone through the full recovery from Grenfell Tower and we know exactly what we've got and I anticipate that is going to take a considerable period of time". "We need to know an explanation".
"I anticipate that London Fire Brigade will be on scene here for many days to come, working with our partners to ensure that we do the best for the people who are waiting for news of their loved ones".
Pedestrians look up towards Grenfell Tower, a residential block of flats in west London on June 14, 2017, as firefighters continue to control a fire that engulfed the building in the early hours of the morning.
The death toll in a fire that ripped through a 24-storey block of flats in London rose to 17 on Thursday, with many people still missing and firefighters facing hazardous conditions as they searched the charred wreck. "Tragically now we are not expecting to find anyone else alive".
Muslims in the tower, awake at 1 a.m. due to Ramadan, acted as life-savers, alerting other residents and helping people to get out of the burning building, media reports said. He says it may be weeks or even months before a full search of the building can take place.
The 60-year-old, who lives nearby, said he called them as the blaze unfolded but they were following instructions to stay inside and put towels under the door of their 21st-floor apartment.
She said early Thursday that authorities have finally extinguished the last pockets of flame, and are trying to secure edges of the building for a fingertip search. "Automatically everybody turns up because we are one family", Phupinder Singh, a volunteer said.
Survivors said they saw the flames racing up the exterior of the building, which had recently been covered in cladding during a major refurbishment finished past year.
The local Grenfell Action Group had claimed, before and during the refurbishment, that the block constituted a fire risk and residents had warned that access to the site for emergency vehicles was "severely restricted".
Police are still searching for an unknown number of missing people after the fire.
Downing Street aides said that the goal of Mrs May's visit was to get a briefing from emergency services and ensure that they had the resources they needed.
Cotton added that many firefighters were treated for minor injuries and heat exhaustion, and some were traumatized by the inability to save more people.
Mrs May's announcement came just before a demand by mayor of London Sadiq Khan that an inquiry be held.