A facility experienced a "process upset" on Wednesday evening, resulting in a large plume of black smoke. The smoke was visible for miles, indicating a significant release. Details of the incident are limited, but it is known that the smoke was a notable presence in the area.

Further information about the incident can be found through other sources. The nature of the "process upset" and its cause have not been specified in available reports.

The incident occurred at a facility in Baytown, with the smoke being reported on Wednesday evening. For more details, readers can consult the original report.