Excerpts from the nwherald.com:
At 5:10 p.m. on Saturday (8/4/18), the McHenry Township Fire Protection District was dispatched to the 400 block of North Mineral Spring Drive after a report that there was an explosion inside a garage. The home is on a dead-end street in unincorporated McHenry with no fire hydrants.
Firefighters spent 30 minutes battling a fire that engulfed the garage and were able to stop it before spreading to the house. The garage was declared a total loss. The cause of the explosion – so powerful that it blew one of the walls a foot away from the base of the garage – still is under investigation.
