UPDATE: Three lanes reopened around 6:45 p.m. and one lane had traffic moving slowly. CHP issued a SigAlert and expected the fourth lane to reopen at approximately midnight.

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All northbound lanes on Interstate 5 at Lake Hughes Road in Castaic are closed due a fire, according to CHP.

A brush fire started around 4:30 p.m. after lightning struck, and all lanes were closed around 5:15 p.m., per CHP.

Expect delays if you are heading in that direction or consider using alternate routes.

Stay with 23ABC for updates.