Gosh. I hope you are okay. As far as I can remember, in 2019, General Motors recalled 368,000 medium- and heavy-duty diesel trucks equipped with engine-block heaters for fire risks after 19 reports of fires. I think the engine block heater cords did a short circuit and caused a fire. Maybe now it would be the same problem. A friend of mine works at https://firerecruitmentaustralia.com.au, and he told me that lately, they turned off two such cars. Honestly, this worries me a bit because I also have a Chevy Silverado. However, I always have a fire extinguisher for such cases.