Hurricane Florence could bring up to 13 feet or more of storm surge to the Carolina coast. What does that look like? We show you like nobody else can https://www.youtube.com/watch?v=q01vSb_B1o0
Wired took a behind-the-scenes look at the visualization. https://www.wired.com/story/weather-channel-hurricane-florence-storm-surge-graphic/
tl;dr: It was done in Unreal Engine.