Two dangers: cold, and total darkness
A cockatiel in a long power cut faces the cold like any small bird — and one extra hazard most birds do not share. Cockatiels are prone to night frights: a sudden noise, shadow, or nothing at all can trigger a panicked, flapping crash around the cage that injures wings and draws blood. Total blackout darkness raises that risk sharply. So the cockatiel plan is twofold: move her cage to the warmest interior room and drape it for warmth, and keep a dim battery-powered night-light glowing near the cage every night of the outage, so she can always see her perches and settle herself after a startle.
Warmth without fumes, as always with birds
A cockatiel loses heat quickly once the heating stops, so insulate early: cover the top and sides of her cage with a blanket while leaving gaps for air, and settle the cage away from windows, exterior doors, and floor-level drafts. Warmth must never come from combustion in her room — no candles, oil lamps, fireplaces, or portable stoves — because a cockatiel's breathing takes in airborne fumes and particles with an efficiency that makes 'a little smoke' a genuine emergency for her. Shared body warmth in the family's main room, plus her draped cage, is the safe heating plan; add a wrapped warm bottle outside the bars on a bitter night if needed.
Managing a night fright if one happens
If a cockatiel does thrash in the night during the outage, the response matters as much as the prevention. Turn on a light — battery lamp, torch, anything — and speak to her calmly until the flapping stops; light is what ends a fright, because she can finally see she is safe. Do not grab her mid-panic. Once she is still, check through the bars for blood on feathers or the cage floor, and line the floor with a soft towel for the rest of the outage if she is fright-prone, so a second episode lands softer. A bird who has lost blood, holds a wing oddly, or stays fluffed and quiet afterward needs an avian vet as soon as the outage permits.
Food, water, and routine in the dark days
A cockatiel copes with an outage best when her small rituals survive it. Keep her seed and pellet cup filled with her usual mix, refresh her water at the usual times, and use the battery lamp to give her recognizable day hours, covering her at her normal bedtime — with the night-light left glowing outside the cover's edge. Talk to her during checks; cockatiels are flock birds, and familiar voices in a strange dim house are reassurance, not noise. Watch that she is eating and that her droppings look normal, and keep other pets and curious children away from her cage while the household routine is upside down.
One plan everyone in the house can see
An outage cockatiel plan fails when one person knows about the night-light and another switches it off to save the battery. Write her outage routine down — the drape, the night-light, the covering hour, the fright response — and put it where the whole household can follow it, because her safety at 3 a.m. depends on whoever hears her first. KinsLe's Family Sharing shares your cockatiel's profile and care information with the family members who help, so everyone works from the same details instead of their own guesses.