Kenner, L.A. ? Tornadoes tore through New Orleans neighborhoods Thursday that had been hit hard by Hurricane Katrina just five months earlier, collapsing at least one previously damaged house and battering the airport, authorities said.

Roofs were ripped off, utility poles came down and a radio tower fell near a major thoroughfare, but no serious injuries were reported.

“Don’t ever ask the question, ‘What else could happen?'” said Marcia Paul Leone, a mortgage banker who was surveying the new damage to her Katrina-flooded home.

She would go no farther than the front porch of her house Thursday morning. Windows were blown out, and the building appeared to be leaning.

“I’ve been in the mortgage business for 20 years. I know when something’s unsafe,” she said.

Electricity was knocked out for most of the morning at Louis Armstrong International Airport, grounding passenger flights and leaving travelers to wait in a dimly lit terminal powered by generators. The storm also ripped off part of a concourse roof, slammed one jetway into another and flipped motorized runway luggage carts.

“There’s more damage to the terminal than I saw during the hurricane,” airport spokeswoman Michelle Duffourc said.

Mari Rodriguez, left, gets a kiss from her neighbor Lovie Geraci in their tornado-damaged neighborhood in the Lakeview area of New Orleans.Tornadoes early Thursday tore through New Orleans neighborhoods that were hit hard by Hurricane Katrina just five months earlier, collapsing at least one previously damaged house and battering the airport.

Wind tore an exhaust vent off another roof and blew it through a concourse window. A metal ladder was wrapped around a light pole, and part of a glass wall fell and crashed onto the tarmac.

Airlines using the damaged concourse were moved temporarily to other gates.

The line of severe thunderstorms moved across the area several hours before dawn. Tim Destri, of the National Weather Service, said it appeared the damage was caused by two tornadoes, one that hit the airport and another that moved into New Orleans.