Passengers said they were told to stay on the plane until responders checked that it was safe for them to leave.
The safety system helped to prevent the airliner from crashing through a fence and onto Hollywood Way, a busy six-lane road next to the airport.
Southwest temporarily suspended operations at the airport, with 20 departures canceled so far. "Customers deplaned the aircraft via air stairs, with no reported injuries among the 112 customers and five crew members", the carrier said in a statement.
The airline is refunding the cost of the passengers' roundtrip airfare and rebooking trips for those with connecting flights, a Southwest Airlines spokesperson said.
Stage set for Women's World Cup draw
Australia were among the top seeds but Alen Stajcic's side must face Brazil and Italy as well as Jamaica in Group C. World soccer's ruling body is aiming to have a record one billion viewers for next year's tournament.
Around the time of the incident, visibility in the airport dropped to 1 mile.
A Southwest Airlines flight traveling from Oakland slid off of the runway at Hollywood Burbank Airport north of Los Angeles amid heavy rain Thursday morning.
In the aftermath of the incident, the FAA implemented a temporary ground stop for Burbank flights departing from airports within about a three-hour flying distance of Burbank, Gregor said. It was raining heavily in the area at the time.
The area is made of lightweight concrete blocks that collapse under the weight of a plane, airport officials said Thursday. "Just beyond the barrier were several cars that would have been taken out".