I should do the research... but I wonder if it still makes economic sense to transport fuel, or other flammable, or otherwise toxic chemicals by train, as opposed to plane.
By my rough back-of-an-envelope reckoning, that train was carrying the best part of 6000 tons of light crude. I can't envisage any way of shifting that amount buy any other means short of a pipeline. Pipelines cost a heck of a lot to build & only go from A to B. Rail already exists, so technically costs nothing, and goes from A to Z via anywhere you want.
Air freight is only really viable for small quantities of high-value goods, & sometimes that goes tragically wrong, as in the case of El-Al 1862.
I see the Fire Chief has spoken up, his description of events makes interesting reading & asks more questions than it answers IMO:
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Death toll now in double figures