I brew on the stove top, so propane, big flames, and hot stands are not currently a concern. But there are big pots, boiling liquids, and large-ish flames. Nothing I would worry too much about but for the nearness of children. They're always there and want to help. I didn't worry about my glass carboys until the kids became a factor. Like a lot of other things in life, my safety didn't seem as important until I realized there are others who depend on me. My safety still doesn't seem as important as their safety, but the kids have made me a better and more conscientious person in many respects.