In Seattle Grace Hospital faces both a literal and figurative collapse as a massive plumbing leak turns into a hospital-wide deluge. While Chief Webber struggles to maintain the hospital's reputation following a drop in national rankings, his personal and professional lives are tested by the chaos. Hospital Crisis: The Flood
: Meredith attempts to quit therapy with Dr. Wyatt , claiming she is finally "happy" now that Derek has moved in. Wyatt remains skeptical, insisting Meredith has only scratched the surface of her issues. [S5E3] Here Comes The Flood
: Now living together, Derek pushes for Meredith's roommates, Izzie and Alex, to move out. Meredith initially resists, feeling that they are her family. In Seattle Grace Hospital faces both a literal
: During surgery, the ceiling collapses onto Alex Karev's patient. Ironically, while clearing debris from the open wound, Alex discovers a stage 1 malignant tumor on the man's pancreas—a diagnosis that likely saved his life because it was caught so early. Wyatt , claiming she is finally "happy" now
: After the ceiling collapse and an electrocution incident in the CT room, Chief Webber is forced to shut down the surgery wing and evacuate patients to other hospitals. Personal Developments
: Neglected maintenance leads to a pipe burst that floods the surgical floors.