I might be going to Dubai in a while (so excited!) and yes, its very warm there in February. I had the chance to go not too long ago and it was really fun. I had never even heard about it when I was living in the midwestern U.S., but it's a really great city, diverse and unique.
Here are some photos. They have an aquarium inside of a mall, and they seem to be fond of aquariums there because they also have them inside of hotels, retaurants, etc.