The injuries are horrific.  There are postings on the internet that describe some, such as this one:

(click for link to post)  

"I was melting lead weights for duck decoys in my workshop that was attached to my house, right off the carport," says Roger. " I was having some difficulty lighting the torch—strange because I had been working with a torch and propane for a number of years. I thought the tank was empty so I switched tanks and couldn't get the second one going either. Eventually I got the torch lit and finished the job. Then I turned the tank off and as I started to walk away, I heard a noise. I turned back to the tank and saw a small blue flame that appeared to be coming out of the top of the tank near the torch attachment.  My immediate thought was that there must be a broken thread so I reached for the tank (I was going to try to turn the torch so it would go out) but before I got to the tank, it exploded.

When I opened my eyes, the ceiling was on fire, the walls and floor was on fire - the whole house was on fire. As I reached out to get myself up, I realized that it had blown me clear down to the end of the house—a good 20 feet. Luckily the door was open to the shop because it blew me down the hallway. It blew all the doors and windows out of the house.

It happened around 10pm; our neighbors came running. My wife was on the main floor-upstairs. She was right over top of the explosion and didn't get hurt at all. I held my breath and began to crawl up the stairs but my hair and skin was peeling off and my lungs were scorched. When I got to my wife, she was screaming. Luckily she had the phone in her hand--I told her to call 911 and say 'House engulfed, critically burnt patient, need helicopter'.

She repeated what I said. We had no time to take anything with us - we lost everything. The phone is all she took with her."