"When the rain begins to fall" is a phrase from a 1984 song performed by Jermaine Jackson and Pia Zadora. The lyrics metaphorically describe when difficulties or challenges arise ("when the rain begins to fall"), a supportive presence will be there to catch and help. The song portrays emotional support and enduring love through tough times, symbolized by rain and rainbows. If the question was about the literal moment rain begins to fall, that is typically the moment rain drops start to descend from clouds during a rain shower. Otherwise, this phrase is mainly recognized as part of the song's title and lyrics about support and hope during difficult moments.
