We are going to see more and more of these types of catastrophes in coming years. The DOT-111 tank car design is woefully inadequate for hauling highly flammable liquids without a major upgrade in safety design. See this article:
http://abclocal.go.com/wls/story?id=9326452. The tanker train run away and explosion that wiped out the center of the Quebec Canada town of Lac-Megantic this summer, killing 47 people, was just such a consist of this tank car design. The tank body is made from a single sheet of steel, easily punctured in a derailment, that allows its contents to empty rapidly onto the ground. Just a single spark with cause it to explode. And there is lots of energy in 34,500 gals of unpressurized volitional petroleum crude or ethanol or gasoline. And in North America we have tens of thousands of these cars riding the rails each day. Ticking Time Bombs. WoW!!!
Of course, transportation wise, the alternate is pumping these chemicals through our very very old and rusted 60-year old plus underground pipeline infrastructure, criss-crossing our country through neighborhood subdivisions, unknown to the residents above them. Ouch!
OlPaint