is installing flood gates at entrances. 7,000 pounds. they are designed to be deployed quickly in the case of undone forecast. water levels will rise by 6 feet by the end of this century. >> i think people see it. >> during hurricane sandy, flood waters entered through the elevator shaft. the port authority reinforced this with aquarium thickness glass. the concern about future floods is so real that the glass stretches 20 feet up. >> on the other end of the country, the concern is over the heat that melted some of seattle's i-5 last month. shane underwood researches asphalt at north carolina state. he says with the world getting