SACRAMENTO COUNTY – One person has died after a crash involving a big rig and a sedan south of Elk Grove early Thursday morning.

The crash happened just before 5 a.m. along the southbound side of Interstate 5, near Twin Cities Road.

Exactly what led up to the crash is unclear, but significant rain was falling at the time. California Highway Patrol confirmed that both a big rig and a sedan were involved – and that the driver of the sedan had been killed.

Due to the crash, the #1 lane was closed. The slow lane remained open, but traffic was expected to be impacted for most of the morning commute.

The road was cleared by 8 a.m.

The deadly crash is among a number of wrecks along Sacramento-area roadways Thursday morning as an atmospheric river moves over region. Significant wet weather is expected.