Spring break plans for thousands headed to or from South Florida have been thrown into disarray as severe thunderstorms pounded the region, grounding flights and shaking up major events. Miami International Airport (MIA) and Fort Lauderdale-Hollywood International Airport (FLL) were hit hard by weather delays with MIA grounding all departures on Saturday morning, confirmed by the Federal Aviation Administration’s National Airspace System. Adding to the woes, a disabled aircraft briefly forced a runway shutdown, and lightning strikes contributed to the delay melee, CBS News Miami reported.