if you re in phoenix, there s no escaping the heat. it s a sign of something called urban heat island. what that is that s a big term. as you the cities get built up and built up, the infa ra infrastructure, and the co concrete, it holds on to the heat. urban heat island. people say phoenix, it s a dry heat. doesn t apply here. we re dogging talking about tems that change the way people live there. there s something happening in the ocean. if you look in the gulf coast, in the florida cease. we re seeing the temperature in the ocean, exceeding 90 degrees. it s the highest temperature for the surface in the florida keys sings 1985. those waters are hot.