A ball python cannot make its own body heat, so a power cut that stops its heat source becomes a slow temperature slide rather than an instant emergency. Your job is to slow that slide, add gentle warmth you can control without electricity, and keep the enclosure shut and secure, because a chilled snake that escapes into a cold house during the confusion is in far more danger than one resting insulated in its hide.
Insulate first, then add warmth carefully
Start by covering the outside of the enclosure with blankets, towels or foam panels, leaving ventilation uncovered, and move it away from external walls and draughts if that can be done without tipping water or opening the lid for long. Then add heat at one end only: bottles filled with warm, not boiling, water and wrapped in cloth, or disposable hand warmers taped to the outside wall, never loose inside where the python can lie directly against them and overheat or burn. A gradient still matters without power, because a ball python that cannot move away from a hot object is at risk even in a cold room. Keep candles, camping stoves and fuel heaters away from the enclosure and out of the room's air.
Monitor temperature and leave digestion alone
Use a battery-powered thermometer or a simple dial gauge placed at snake level, and write down readings and times so you can see the trend rather than reacting to one glance. Ball pythons tolerate a temporary dip toward the cooler end of their normal range far better than a spike from improvised heating, so aim for steady and safe rather than chasing the usual warm-spot figure with risky devices. Do not feed during the outage, and if your python ate recently, extra handling and disturbance only add stress it cannot support with digestion slowed by cool conditions. Offer no handling sessions for warmth from your own body beyond a brief transfer if you must move the snake, and keep children and other pets away from the open enclosure during any move.
Security matters more in the dark
Power cuts mean torches, open doors, people carrying blankets and water, and a lid lifted more often than usual, which is exactly how a quiet ball python leaves unnoticed. Clip or weigh the lid as you normally secure it, check the snake is inside after every bottle change, and close the room door so any escape stays in one searchable space. If you decant the python into a smaller emergency tub, use a ventilated, firmly latched box lined with a towel, placed inside the insulated enclosure or the warmest room, and label it so nobody opens it out of curiosity. When power returns, let temperatures climb gradually, confirm the thermostat and heat source are working together before trusting the set-up overnight, and watch breathing and behaviour over the following days.
After the lights come back on
Check your python for wheezing, open-mouth breathing, mucus or unusual lethargy in the days after a long cold outage, and contact a reptile vet if breathing sounds persist, feeding refusal stretches well beyond the outage with weight loss, or the snake cannot coil and move normally. Record how cold the enclosure became and for how long, because that history helps the vet judge the risk. Restock the emergency kit straight away: fresh hand warmers in date, spare thermometer batteries, insulation that lives beside the enclosure and a latched travel tub. And because an escape during the confusion can put this snake behind furniture or through an open door before anyone notices, keeping your KinsLe Lost Pet Alert System details current is the safeguard that helps whoever spots it get word to you fast, while the search area is still small.