melissa dipane cold it is, d.c. firefighters fighting an earlier fire in locations. they were switching out to thaw out hands, feet, and equipment. this, while they were knocking down flames at a northwest house that left five people displaced. the cyclone may be over, but more than 20 million people are still under a winter weather advisory. if that was not bad enough, travelers at new york's jfk airport dealing with a flooded terminal. look at that river inside the terminal. this is because of a water main break there as well. the terminal had to be evacuated , but as chuck sivertsen shows us, they dealt with a big baggage claim headache. chuc t ice. 14 people displaced after a five-alarm fire. fires covered in ice. jfk airport, another travel might mayor on top of already long to lay spirit a water main break flooding one of the terminals, adding to the delays, which were as long as 12 hours. some passengers sleeping in the check in areas overnight. others whose flights had arrived, forced to wait hours on the tarmac. >> it was just really uncomfortable. attendant

melissa dipane? melissa: wssc says that the temperature of the potomac river is directly connected to water main breaks in the service area. the long cold snap has the techs on alert. >> even the smallest change in flow to the 1.8 million customers is monitoring and adjusted from this control center in laurel. one screen watched in the cold months is this one measuring the water temperature of two area rivers where wssc pulls its water. is there we treat water off the potomac river. so when the water comes through in the treatment process the colder the water, it will impact what goes out to the system. >> when the water temperature drops, these text start watching for water main breaks. >> a change in the temperature will cause a shock to the pipes. the coldest pipes, that is where u >> while the system can help keep an eye on the possibility of breaks. it can't tell where a break will happen. when the breaks occur, wssc depends on the public to call in to tell them when and where and what they see.