"Not a cloud in the sky" is not a phrase heard very often here on Key Biscayne, Miami. Especially not at midday in summer. There is simply too much heat and too much water, so it is inevitably raining somewhere. But that is a trait of the tropics which one comes to love – storms dotting the horizon like jewels on a headband, popping up just where they're most needed to cool things off. Politely allowing you enough time to enjoy the sun, but nevertheless insistent in fulfilling their own role as well.