i am joined by marchita davidson.are seeing he streams, the hot get colder and all corners of the u.s. >> what it means in the scientific community is that it's a really challenging time right now, challenging and exciting to go try to understand what these extreme weather patterns mean for our climate. >> i got to look at the significant cost involved where it's not just the devastation caused by extreme weather but hidden cost as well. >> it's whether it is rain, heat, drought. it's happening. it's big. let's take a look. oxnard, california december 12th, 2014. >> roger, a flash flood warning for northwestern los angeles. >> national weather service severe weather team has been at it for hours. >> the storm was no surprise. scientists and techknow's camera were tracking. what meteorologists were calling the storm of the decade hit california with a vengeance a met the national -- i am at the in charge weather services. operations were at an elevated level after one of the worst storms to hit the state. massive snow