This is a very good question and one that worries many mothers of young children. Generally, the answer is no. However, if the blanket is old, and the wire insulation is worn, then it is possible for a child to get a shock. However, it is highly unlikely to be a fatal shock. We recommend that you use a waterproof cover over an under-blanket. If you use a top heated blanket then the problem is academic. You may prefer to use a heated throw on top of the child’s bed rather than on the bottom where it is subject to getting wet if the child wees.