The London Fire Brigade and firefighter Rob Petty shared a handful of pictures of the "wonderfully grounded" Londoner as she joined them at the station.
The Hello singer headed to Chelsea Fire Station on 19 June to chat with some of the firemen and women who responded to the catastrophic fire, which engulfed the north Kensington tower block on 13 June and killed more than 80 people.
He captioned the image: "Not everyday the wonderfully grounded and caring Adele pops into Chelsea Fire Station for a cup of tea and a cuddle".
Eyewitness Tom Maughan told the Press Association: "She was so nice".
The same might be said for Adele and her act of kindness.
"She didn't have any security with her, it was a bit surprising".
Adele near the #Grenfell Tower in an Abaya.
News of her visit quickly spread among fans, who took to Twitter to shower her with praise for her actions - and for keeping such a low profile while doing it.
Lily Allen attended a protest which she live-streamed, while Simon Cowell will release a charity single to raise money for the victims.
Mr Cundy said the death toll of 79 may still change, but not as significantly as it has in recent days.