This video, posted by YouTube user zidyboby, captures the explosion at a fertilizer plant in West, Texas, just north of Waco. Hundreds of people are believed to have been injured in the massive blast that happened Wednesday, and authorities are urging about half of the town's residents to leave due to possibly toxic fumes. (via The New York Times' Brian Stelter) Watch live coverage of the blast, from NBC 5, here.