Deadly tornadoes touched down Friday west of Oklahoma City, crumbling cars and tractor-trailers, trapping motorists and killing at least two.

The Oklahoma Highway Patrol said troopers found the bodies of a mother and a child near a vehicle along Interstate 40 west of the city Friday.

The broad storm hit during the evening rush hour, causing havoc on I-40, a major artery connecting suburbs east and west of the city.

To the south, winds approaching 80 mph were forecast for Moore, where a top-of-the-scale EF5 tornado killed 24 on May 20. Meanwhile, at least 54,000 people were affected by power outages. The Oklahoma Highway Patrol also reported motorists injured or trapped in their cars in the Oklahoma City area while others were missing.

The National Weather Service issued a tornado emergency for the city's downtown, airport and several suburbs. The weather service issues an emergency if a storm with tornadoes is heading toward large metropolitan area. The warning covered Will Rogers World Airport in Oklahoma City, which was evacuated at 6:30 p.m. while staff and passengers were taken to an underground tunnel until the threat passed, and there were no flights inbound or outbound.

Floodwater collected in streets and troopers requested a number of ambulances at I-40 near Yukon, west of Oklahoma City.

"I'm in a car running from the tornado," said Amy Sharp, who last week pulled her fourth-grade daughter from the Plaza Towers Elementary School as a storm approached with 210 mph winds. "I'm in Norman and it just hit Yukon where I was staying" since last week's storm.

"I'm with my children who wanted their mother out of that town," Sharp said, her voice quivering with emotion.

Hail and heavy rain pelted the metro area to the point that emergency workers had trouble responding to reports of injuries.