In Greek mythology, Euros, Boreas, Africus and Notos are the four winds.(Ventus: wind)
These winds do battle, cause conflict and damage as men do.
Enya is cynical and is having a hard time believing the sky is "Caribbean Blue" because men are not true or honest. I guess she is comparing
battle of the winds to conflicts among men...or wanting answers from the winds.
Song could be the theme song to our current times with no truth
or honesty from politicians or Limbaugh, Hannity, O'Reilly media whores.