There have been no chemical injuries so far after the fertiliser plant explosion in West, Texas, a doctor at the Hillcrest Hospital said.
A spokesman said at least 60 employees of the West Fertilizer Co were being treated at the hospital.
Victims in the hospital currently include those with skin injuries, bruised lungs, and impact injuries from the initial blast and from subsequent debris.
Rescuers continue to search through rubble for survivors after a massive explosion at a Texas fertiliser plant killed as many as 15 people and injured more than 160.
Police have said that there is no indication to suggest that the explosion was anything other than an accident.
ITV News Correspondent Paul Davies reports:
The effects of the blast at a fertiliser plant in West, Texas, were felt 45 miles away.
The US Geological Survey said its shockwave was equivalent to an earthquake measuring 2.1 on the Richter scale.
ITV News science editor Lawrence McGinty explains why the chemicals in fertiliser can be so explosive:
A man who filmed the widely circulated mobile phone footage of the explosion at a fertiliser plant in West, Texas, says he feared for his life.
Derrick Hurtt said he knew he was filming a fertiliser plant and expected a blast because of the fire, but the size of the explosion came as a shock.
"I thought it killed both of us really," he said, referring to his daughter who was also in his truck. "I know it went quick but it seemed like it lasted forever."
"It was like one big shockwave that hit us, then there were three or four more that kept coming through the truck," he said in an interview with NBC News. "And there was debris flying everywhere."
Texas governor Rick Perry has declared McLennan County a disaster area and requested an emergency declaration from the president.
Local TV reporter David Schechter has posted a YouTube video of a the charred remains of a house in West, Texas, on the morning after a huge explosion at a fertiliser plant in the town.
Aerial footage shows the fertiliser plant in West, Texas, smouldering on the morning after an explosion caused at least five deaths and over 160 injuries.
Police in Texas have expressed their relief that pupils were not at school when a fertiliser plant exploded in the town of West, Texas.
As shown in the map above, the West Fertilizer Co neighbours the West Independent School District and the West Middle School.
The West Rest Haven just to the north of the school suffered severe destruction.
"Thank God school was out," said Waco Police spokesperson William Swanton of the blast, which happened at around 8pm local time.
Texas police say they are still treating the factory in West, Texas, as a crime scene, but said it is routine for them to do so.
The total number of those injured following the explosion has now passed 160, they said.
Any public danger due to chemicals in the air has now gone thanks to the weather in the area, police added.
The death toll is still believed to be somewhere between five and 15.