Generate a question that has the following answer: Flash floods for the following movie plot: Seventeen-year-old Joshua "Josh" McGuire (Rhys Wakefield), expedition bank-roller Carl Hurley (Ioan Gruffudd) and his girlfriend, Victoria "Vic" Elaine (Alice Parkinson), travel to the Esa'ala Cave, an underwater cave exploration site in Papua New Guinea. Josh's father, Frank (Richard Roxburgh), a master diver, has already established a forward base camp at a lower level inside the cave, where the team has been exploring for weeks. As Josh voices his disdain for his father and his opinions about cave exploration, the team below prepares to dive into an unexplored area of the system. While exploring the entrance to the new system, Judes (Allison Cratchley) experiences a problem with her air tank hose. She loses use of her air mask forcing Frank to buddy breathe. After a few exchanges, Judes panics and tries to keep the mask on, but Frank forces the mask off of her knowing he will not have enough air otherwise to make it back to the team. As Judes drowns, Josh watches on a monitor at "forward camp" and presumes the worst of his father. In a struggle to determine who truly was responsible for her death, it is revealed by Frank that Judes had dived in an exhausted state since they previously had to retrieve the extra bailout tanks, a task Josh didn't do. Meanwhile, their above-ground crew realizes that a very big storm is preparing to hit their location sooner than anticipated. They attempt to warn the team below, but are unsuccessful. Josh expresses his desire to return to the surface and with communications down and an uncertain expedition in front of them, team leader Frank agrees to have his son return to the surface with a buddy climber ahead of them. While Josh climbs back towards the surface with Luko, Liz, and J.D, water begins rushing in from their exit. The storm they were trying to avoid had turned into a cyclone causing flash floods that begin to fill the cave. As J.D. and Liz make their way up through "the elevator" (an area leading up to the main entrance of the cave), Josh is unable to leave his...
A:
What does the storm cause?