Moving quickly after devastating winds from Hurricane Ida on Aug. 29 took out eight critical high-voltage lines and blacked out New Orleans, Jefferson, and two other Louisiana parishes, Entergy hashed out two options. One—the “preferred solution”—was to restore some of the critical transmission lines that tie Greater New Orleans to the larger MISO grid, and the second was to create an “island” that would temporarily isolate the Greater New Orleans region from MISO.