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.

The incident occurred at a facility in Baytown. Further information about the "process upset" and its cause is not available in this brief summary. For more details about the incident, including any potential impact or response, readers can refer to the original source.