The song was released by Warner Bros. Records for digital download and streaming on 1 December 2017 as the album's third promotional single.
Music critics complimented Lipa's vocals and its lyrics, but some thought the idea of a piano ballad felt forced.
Caroline later sent Lipa an email that read that Martin really enjoyed her work and requested that she meet him at a studio in Malibu, California.
In one of Lipa's last trips to Los Angeles to finish her debut album, they arranged a second session at Woodshed Recording Studio in Malibu.
[7][8] Constructed in verse-chorus form, the song is composed in 44 time (save for a 54 interluding passage after the first chorus) and the key of F♯ major, with a slow ballad tempo of 66 beats per minute and a chord progression of D♯m–B–F♯–C♯sus–C♯.
The song's opening line, "Here, where the sky's falling, I'm covered in blue," was inspired by how Lipa enjoys when it rains in Los Angeles because it feels like London.
[1] It features religious imagery in the lyrics; she references guardian angels and alludes to Jesus walking on water from the Gospel of Matthew.
[22] Neil Z. Yeung of AllMusic labelled the song as "delicate" and praised its revelation of Lipa's "vulnerability and softness."
[23] For musicOMH, Ben Hogwood praised it for being the "least manipulated" song on its parent album, while also noting its "welcome tenderness" and "genuine sense of yearning.
"[24] Dylan Yadav of Immortal Reviews called it a "nice change" from the rest of Dua Lipa and "a beautiful end to the record.
"[25] The Fader's Aimee Cliff categorised Lipa's vocals as "fiery" and labelled the song as a whole "a straight-up 'I miss you' ballad.
"[26] For Rolling Stone, Jonah Weiner it as a "wounded ballad" and "a slow, spotlit showcase for her rich, smoky voice.
"[29] In a negative review from The Line of Best Fit, Claire Biddles stated it feels "tacked on and unnecessary," while also suggesting it is the result of "a record label employee needing to tick the 'piano ballad' box.