An 8:30 a.m. tweet, accompanied by a red alarm GIF, said the airport experienced a "power bump" that caused its systems to go offline.
"Our two busiest airlines, American Airlines and Southwest, are having significant flight impacts," airport officials said. "We recommend that passengers check flight status before coming to the airport."
More than 200 flights were delayed, more than 90 were canceled and over 15 inbound flights were diverted to other airports.
