the blaze began after a tractor-trailer truck caught fire nearby.
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Those pesky tractor-trailers.
Going around ‘catching’ fire.
Just exactly does that happen?
Diesel is hard to light.
Maybe the cargo was flammable, or still hot, like the coals in the wood stove ashes you put outside.
And what was the truck doing at a closed (I have read) facility?
Truckers often sleep at closed facilities. DOT rules allow 11 hours of driving in a 14 hour maximum work day with a mandatory 10 hour break. You can imagine of the driver runs 9 hours, works ten then rests for ten, he’s not on a normal workday schedule.
One of my sons is a OTR trucker. He may have a 8am delivery time but arrives at the site the night before so he crawls into his sleeper to take the mandatory break.