From RT_com twitter
https://twitter.com/RT_com/status/1184227818978336770
Massive explosion & fire at California NuStar refinery triggers hazardous materials emergency
From the twitter thread mentioned in the post, that this one this one is replying too.
Puts some pieces together logically
https://pbs.twimg.com/media/EG83U0uX0AAmccw?format=png&name=small