NHK World TV’s weather presenters put this picture up before they went to the weather forecast tonight. All I could figure out with reverse translations is that 冬 is winter (character on the white t-shirt and on the blanket; is that Mr Winter sleeping in the bed, then?) and that 火 is fire. I guess the safety tips would be to hang up clothes well away from space heaters; have a fire extinguisher handy, and watch for items on the stove top.