According to the Daily Breeze, “a vacant work trailer caught fire at the Torrance Refining Company on Saturday, June 1, though officials said operations at the refinery were not impacted.” Daily Breeze link
It is worth noting that the refinery also endured an Unplanned Flaring Event on 05/30/2024 at 05:57 AM, the eighth unplanned event so far this year.
For the latest incident, Supervisor Janice Hahn posted:

Three temporary offices burned at the Torrance Refinery this weekend.
Worth remembering that this refinery is one of two in the state that uses highly toxic MHF. This fire is a reminder that accidents happen — and the wrong accident at this refinery could mean a mass casualty event.
MHF is too dangerous to have in our refineries and our communities will not be safe until it is gone.