Sequía literally translates to "drought," a long period with little or no rain. It's a word you might associate with weather, not romance, which makes its use here so unique.
In the song, Ricky Martin sings of "besos en sequía" (kisses in drought). He uses this powerful metaphor to describe a lack of affection and intimacy, painting a vivid picture of emotional thirst and longing for his lover's return.
Have you ever been so sure someone is coming back to you, even after they've left? That's the whole mood of this classic Ricky Martin track. He's singing to a lost love, someone he was completely devoted to: "Yo que te amé / Que jamás te mentí / Me entregué sólo a ti / Y te perdí" (I who loved you / Who never lied to you / I gave myself only to you / And I lost you). He admits he gambled everything on this person and lost.
But he's not giving up hope. In fact, he's not hopeful, he's certain. The entire chorus is a powerful declaration: "Volverás, volverás / Seguro que pronto vuelves a mi vida" (You will return, you will return / I'm sure you'll soon come back to my life). He imagines that when they do come back, things will be different. There will be no more "Besos en sequía" (Kisses in drought), and his lover will get to "beberás / Toda mi energía" (drink / All my energy). It's a song full of confidence and intense longing.