Almost every day I see a house fire on the news due to improper use of extension cords and/or space heaters. Most of these homes did not have working smoke & fire detectors.
Please be careful with space heaters and fireplaces, and do not overload electrical circuits. Also, check your smoke detectors to make sure they are working, if not, let me know.
Read this entire post by Fred Durso, staff writer for NFPA Journal.