Just happened to drive past it on the way to Jebel Ali, on Shk Zayed road, and even though well below the gigantic smoke plume, I got the feeling it was rather toxic. I base this simply on the fact I started wheezing shortly thereafter. Perhaps nothing at all, just being paranoid, but you never know in Dubai.
Damn it all, I never get this motivated to get up early on days off. Usually sleep thru all the fog, massive car accidents, burnings and explosion events, haha.