Tempestad translates to "storm" or "tempest". While it's a common word, its use here is particularly evocative and less frequent in romantic ballads than more direct emotional terms.
In the song, it's used metaphorically: "Que la tempestad dura lo que el sol tarda en alejarla" (That the storm lasts as long as the sun takes to drive it away). This line beautifully captures the feeling of enduring hardship and waiting for brighter times, making it a memorable and poetic choice.
Have you ever been told to 'keep calm' when your heart is completely broken? Luis Figueroa knows exactly how that feels in "Hasta El Sol De Hoy" [Until Today]. He's been told that his ex's heart 'se escapó de mí' [escaped from me] and that 'no pudo ser' [it couldn't be], but he still holds onto the hope that she misses him too.
He sings about how 'la fe mueve las montañas' [faith moves mountains] and that storms don't last forever, but he's still stuck in the rain, 'solo con mis ganas de encontrarla' [only with my desire to find her]. He hasn't seen her 'hasta el sol de hoy' [until today] and doesn't know what tomorrow holds, but he's determined to 'esperar por ella sin perder la calma' [wait for her without losing calm]. It's a really honest look at holding onto hope even when everything seems lost.