Not a cause. But swift action probably saved a lot of lives.
http://www.waow.com/story/22018558/2013/04/18/timeline-of-west-texas-explosion
...The events of Wednesday night started around 7:30 p.m. with a fire at the fertilizer plant. Almost immediately, homes, businesses and more than 130 nursing home residents were evacuated. Less than 30 minutes after the initial fire, the explosion happened...
Start your own thread...this is not about West, Texas.