In Texas, four storage tanks caught fire at the North and South Oil Company near Luling in Caldwell County on Saturday 2 January.
The company, which drills and stores oil, is investigating the cause of the incident.
There's not anything suspicious at this time. It's just a precaution. Let them come down and look at it since we don't know what started it, Jim Parker, Caldwell County emergency management coordinator, says.
There were no injuries at the site.