The singer went on to say that the chorus and, by extension, the song was also an allegory for her struggles with alcohol, and specifically with drinking to numb painful experiences: "And you know what it's also a metaphor for, is the amount of drinking that I was doing to numb myself," she said. "I'd rather be dry. I'd rather not be drinking, but I haven't died yet. I'm still alive. Rain on me. Okay, I'm going to keep on drinking."
Both the tears and the alcohol being symbolized by the rain are the result of heartbreak and emotional hardship, which are the emotions at the core of the song's meaning (via CapitalFM). Of course, if you interpret it as being because of all of the terrible news that has taken place over the course of this absolute trash fire of a year we've had, well, that works too (via Cosmopolitan).