Just the facts mam....
Cancellations, reroutes, and bus bridges on Riverside "UP" ML Route affected by Jurupa fire this morning:
Metrolink Advisories
Riverside City fire incident reports:
Riverside FD Incidentt Updates
I could find no word, as yet, on any causes of the fire, nor of any casualties at this time, on any of these official sites. However, this fire may have resulted in some minor leakage of troll pus on AP.