RIVERSIDE, Calif. — A fast-growing wildfire Friday in windy Southern California has prompted multiple evacuation orders and warnings.

The Springs Fire broke out at around 11 a.m. Friday and by 2:30 p.m. had grown to 2.34 square miles (6.06 square kilometers). The cause of the fire east of Moreno Valley in Riverside County is under investigation. It was not immediately known how many households are under evacuation warnings or orders.

“It’s windy out there,” said Maggie Cline De La Rosa, a public information officer for Cal Fire Riverside.

A Cal Fire map showed the fire burning in a recreational area near the city of Moreno Valley, which has a population of roughly 200,000. The city is 64 miles (103 kilometers) east of Los Angeles.

The National Weather Service issued a wind advisory for San Bernardino and Riverside County valleys through Saturday afternoon, with gusts of up to 50 mph (80 kph) expected.

“Tree limbs could be blown down and a few power outages may result,” the advisory read.

The FBI is investigating a potential “threat” at Kansas City International Airport in Missouri, which was partially evacuated Sunday afternoon, the Kansas City Aviation Department said.

Airport spokesperson Jackson Overstreet told the Associated Press in an email that the threat was reported at 11:50 a.m. local time, at which point the entire terminal was evacuated.

He told the outlet that planes that had landed after the threat was received were being held on the taxiway.

FBI spokesperson Dixon Land said the bureau was “aware of the incident and our personnel are working with airport and law enforcement officials to determine the credibility of a threat.”

Passenger Logan Hawley, 29, told the outlet he was getting ready to board a flight to Texas when he saw police and K-9 units swarming the terminal.

“Suddenly there was an airport worker saying ‘immediately evacuate,’ people got up fast and rushed out of there,” Hawley said.

Roughly 2,000 people were ushered out of the terminal and onto the tarmac, he said.

Photos and video from the airport circulating online show large groups of passengers being led onto the tarmac or funneling out of the terminal.

This is a developing story. Please check back for updates.

With Post wires