Dozens of police officers held back booing crowds and broke up scuffles as her vehicle drove off from a local church, where she had met survivors, residents and volunteers and promised new funds for those affected.
"Our absolute priority.is identifying and locating those people who are still missing", Cundy said.
Planning documents detailing the refurbishment of the block did not refer to a type of fire barrier that building safety experts said should be used when high-rise blocks are being re-clad.
However, local media reports suggest inadequate fire-proofing in the 120-apartment block could be to blame.
Firefighters, meanwhile, will search the charred shell of the building for bodies.
"It was so preventable, and that's why we're so angry", said Alia Al-Ghabban, a veterinary receptionist who lives on the estate.
Many of these residences are owned by wealthy people overseas who buy London property for investment or residency purposes, but don't live in the property.
Emergency inspections will begin this weekend of all buildings in Britain similar to Grenfell Tower as it emerged that the cladding used on the structure was the cheaper and more flammable of two options made by its manufacturer.
Perovic said cladding need not pose a fire risk in Canada if companies comply with existing building code rules, but added it's typically impossible to tell if a finished structure falls short until trouble strikes.
"The scale of this tragedy is clearly proving too much for the local authority to cope with on their own", Mr Khan said in an open letter to Ms May. "People deserve answers; the inquiry will give them".
The focus of criticism centres on the cladding fitted to external walls on the 1970s concrete block as part of a 8.7 million pound refit ($11 million) completed a year ago.
A Jeremy Corbyn supporter also heckled him about not supporting the Labour leader and some reports claim a bottle was thrown towards him. "What are you going to do about it?" a boy asked Khan, as the mayor tried to stop tensions rising further. Dozens of people are missing, including members of three families who lived on the upper floors.The search and rescue teams will use sniffer dogs, and build internal shoring as they go.
Fellow London MP Harriet Harman urged politicians to pursue the inquiry quickly, warning Fire Minister Nick Hurd if they didn't act "you and all of us are culpable".
The area surrounding the tower has been plastered by desperate relatives with pictures of the missing, from grandparents to young children.
"That's why I'll be visiting later today to see if there is anything more that we can do - we've already released emergency funds - I want to make sure we do everything we possibly can".
Cladding has played a contributing role in numerous fires worldwide, including the New Year's Eve fire at a 63-story luxury hotel in Dubai, and other severe fires in the United Arab Emirates.
"We like to think of ourselves as "roughty, toughty" and heroes - they are heroes - but they have feelings".
The police's casualty bureau was said to have received 5,000 calls during the chaotic first day of the investigation.
Numerous displaced are living in churches and community centers.
"I spoke to one of my officers who was very near when someone came out the window, and he was in tears and he is a professional fire officer, " Cotton told Sky News.
Hundreds more remain unaccounted for.
Every other month, Gary Jones made a 400-mile round trip from his home to Scotland with one aim in mind - to take the ideal picture of a kingfisher.