TULSA, Oklahoma: The first batch of severe weather in the US tornado season devastated an Oklahoma mobile home park, as storms across the area damaged buildings, tore off roofs and left debris strewn across roads. One person was killed and several were injured.

Tens of thousands of Oklahoma residents were without power early Thursday as officials assessed the damage.

Tulsa County Sheriff’s Capt. Billy McKelvey said one person was killed in the mobile home park, which he said could accommodate 40 to 50 trailers. It wasn’t yet clear whether it was a tornado or straight-line winds that hit the park.

The Oklahoma Department of Emergency Management said it had reports of nine people taken to hospitals. McKelvey said he believed at least 15 were hurt. Tornadoes were seen elsewhere in Oklahoma, as well as neighboring Arkansas.

The tornado season usually ramps up for parts of the US in March, but until Tuesday — when a waterspout formed over an Arkansas lake — the US hadn’t had a tornado in more than a month.