why do meth labs blow up?

Question by Charlie Day: why do meth labs blow up?
What is it that makes a meth lab blow up? You hear about this alot on the news and I was wondering what chemical or chemical reaction is so explosive.

Best answer:

Answer by Otts Shoals
There are organics solvents including acetone and ethers that are very, very flammable. When heated they vaporize and a spark source (electrical appliances) can set them off.

Add your own answer in the comments!