H2S leak in lubricant plant

A H2S leak has been reported at a lubricant plant in USA. It is reported that a small amount of the gas was released when an additive for oil-based vehicle engine lubricants overheated. Other news reports indicate that a tanker truck overheated and released H2S. I just randomly looked up a MSDS of an automotive lubricant and it does warn about heat as one of the conditions to avoid and also identifies H2S under exposure controls/personal protection.
Read the article in this link. Read another report in this link
Read the MSDS of a automotive lubricant in this link
Read a technical bulletin of an overview of H2S including its hazards in this link.