ATLANTA, Georgia (CNN)  -- Atlanta's Hartsfield-Jackson International Airport was back in operation late Thursday after lightning hit the control tower and severe storms knocked out power to the area.





The control tower and three of the airport's five runways were open, said Kathleen Bergen, a spokeswoman for the Federal Aviation Administration. All systems were running on emergency generator power.





A ground stoppage was already in place for arriving or departing flights when lightning struck the tower at 8:45 p.m., according to Bergen. People evacuated the tower and a smoky odor was investigated. At 9:10 p.m., the all-clear was given and controllers returned to the tower, she said. But at 9:20 p.m., the tower and parts of the airport were hit by a power outage. The outage affected all the airport's runway lights, Bergen said.





During the outage, planes headed to Atlanta from other airports were being held on the ground, Bergen said, and arrivals were circling or being diverted to other airports.





Atlanta's airport is one of the world's busiest.
What did the aiport do during the outage? Where are the storms occurring? What did the outage affect? What does power outage affect? Where is the control tower located? The power outage was how big? Where is Hartsfield airport? What were arriving planes told?
to other airports. ATLANTA, Georgia Hartsfield-Jackson International Airport all the airport's runway lights, Hartsfield-Jackson International Airport affected all the airport's runway lights, ATLANTA, Georgia circling or being diverted
question: What did the aiport do during the outage?, answer: to other airports. | question: Where are the storms occurring?, answer: ATLANTA, Georgia | question: What did the outage affect?, answer: Hartsfield-Jackson International Airport | question: What does power outage affect?, answer: all the airport's runway lights, | question: Where is the control tower located?, answer: Hartsfield-Jackson International Airport | question: The power outage was how big?, answer: affected all the airport's runway lights, | question: Where is Hartsfield airport?, answer: ATLANTA, Georgia | question: What were arriving planes told?, answer: circling or being diverted