When the lab blew up Friday night, police say 27-year-old Amanda Hepler and her boys aged 2 months, 1 year and 2 years old, were in the room.
Authorities say Hepler was arrested Saturday on an outstanding felony burglary warrant, and the children were placed into protective custody.
The Redding Record Searchlight reports (http://bit.ly/1nZ3goC) 28-year-old Daniel James Ogram of Redding was flown to a burn center for treatment.
Police are still looking for a second woman also reported to be in the room.
Hash oil is an illegal marijuana byproduct that is extracted with butane from discarded parts of the plant.
Information from: Record Searchlight, http://redding.com