An injured person evacuated from a nursing home after an explosion at a nearby fertilizer plant in West, Texas, April 17, 2013.Rod Aydelotte/Waco Tribune Herald/The Associated Press
In this Instagram photo provided by Andy Bartee, a plume of smoke rises from a fertilizer plant fire in West, Texas on April 17, 2013.Andy Bartee/The Associated Press
A firefighter searches a nursing home that was damaged after an explosion at a nearby by fertilizer plant in West, Texas.Rod Aydelotte/Waco Tribune Herald/The Associated Press
Rescue workers pass a damaged apartment complex after a nearby fertilizer plant exploded in West, Texas.Rod Aydelotte/Waco Tribune Herald/The Associated Press
A fire burns at a fertilizer plant in West, Texas after an explosion April 17, 2013.Michael Ainsworth/The Dallas Morning News/The Associated Press
A fire burns at a fertilizer plant in West, Texas.Michael Ainsworth/The Dallas Morning News/The Associated Press
The remains of a fertilizer plant burn after an explosion at the plant in the town of West, near Waco, Texas, early April 18, 2013.MIKE STONE/Reuters
The remains of a fertilizer plant burn after an explosion at the plant in the town of West, near Waco, Texas.MIKE STONE/Reuters
A vehicle is seen near the remains of a fertilizer plant burning after an explosion at the plant in the town of West, near Waco, Texas.MIKE STONE/Reuters
Smoke rises as water is sprayed at the burning remains of a fertilizer plant after an explosion at the plant in the town of West, near Waco, Texas early April 18, 2013.MIKE STONE/Reuters
A chemical trailer sits among the remains of a fertilizer plant burning after an explosion at the plant in the town of West, near Waco, Texas early April 18, 2013.MIKE STONE/Reuters
A firefighter walks past a pickup truck with debris from a storage shed on it at a fertilizer plant in West, Texas after an explosion April 17, 2013.Michael Ainsworth/The Associated Press
The remains of a fertilizer plant burn after an explosion at the plant in the town of West, near Waco, Texas early April 18, 2013.MIKE STONE/Reuters
A damaged vehicle is seen after an explosion at a fertilizer plant in the town of West, near Waco, Texas early April 18, 2013.MIKE STONE/Reuters
Waco Police spokesperson William Swanton speaks at a media conference regarding an explosion at a fertilizer plant in the town of West, near Waco, Texas early April 18, 2013.MIKE STONE/Reuters
Firefighters search an area destroyed by a fertilizer plant explosion in West, Texas, early April 18, 2013.LM Otero/The Associated Press
A fire burns in an apartment complex destroyed near a fertilizer plant that exploded earlier in West, Texas, April 18, 2013.LM Otero/The Associated Press
Firefighters use flashlights to search a destroyed apartment complex near a fertilizer plant that exploded earlier in West, Texas, April 18, 2013.LM Otero/The Associated Press