Everything that could have gone wrong did on Interstate 4, the main artery connecting east to west Florida through the heart of Disney World early Wednesday morning.

A dramatic drop in humidity created a white haze of fog that blanketed this speeding expressway like snow from an avalanche while at the same time a controlled burn whipped into a smoky wildfire that, when combined with the fog, turned visibility to zero.

38 people were injured and four lost their lives in a twisted 70 car pileup, among the worst highway disasters in Florida history. 

What Caused Florida’ s Fatal 70 Car Pileup on I-4