A big bird with big feelings in the dark
A cockatoo rides out a long power cut on warmth, routine, and occupancy. She is large enough to hold body heat better than a budgie, but she is also the bird most likely to unravel emotionally when light, noise, and routine vanish at once — and an unraveling cockatoo screams, chews everything within reach, and may turn on her own feathers. Move her cage into the warmest interior room the family is actually living in, because her bonded person's presence is itself a calming resource. Drape the cage against drafts, and settle her early, before the house cools and tempers fray.
Warmth yes, firelight absolutely not
A cockatoo's respiratory system is exceptionally efficient and exceptionally vulnerable, which makes outage heating a trap in her room. Candles, oil lamps, fireplaces, wood stoves, and generator exhaust all load the air with particles and gases a cockatoo takes deep into her air sacs; a room that smells merely 'a bit smoky' to you can be a veterinary emergency for her. Warm her with insulation, shared body heat, and a wrapped warm bottle outside the bars if the night is bitter. If the household must burn anything for heat, the cockatoo's cage goes to the furthest closed room from it.
Darkness on schedule, light on a rhythm
A cockatoo who normally gets a covered, quiet night will not sleep through a blackout household stumbling around with torches, and sleep loss feeds next-day screaming. Keep her day-night rhythm deliberate: battery lamps giving soft general light during her waking hours, and her cover on at her normal bedtime, with the family's outage activity moved away from her cage after that hour. If she calls out in the night, a brief calm voice answer usually settles her better than uncovering her into full activity. Predictable rhythm is what tells a cockatoo that this strange dim period is a phase, not a new and worse world.
Occupying the beak before stress occupies her
Boredom and anxiety in a confined cockatoo become feather damage and relentless screaming faster than in most parrots, and a power cut removes her usual entertainment — people moving, music, household life. Give her fresh destructible wood, cardboard, or a knotted clean cloth each day of the outage, rotate the pieces she ignores, and spend short sessions talking, whistling, or playing the call-and-response games she knows. Keep her pellets, favored nuts, and water on her normal schedule, and watch her intake honestly: a cockatoo who stops eating, breathes with effort, or sits fluffed and silent instead of demanding attention is a bird who needs an avian vet as soon as one is reachable.
Company is the outage plan
More than any bird in this set, a cockatoo's outage safety is social: she needs her person's voice, presence, and predictability more than any piece of equipment. Settle her where the family gathers, include her in the room's conversation, and keep her handling gentle and familiar rather than constantly checking and catching her. Questions will still come up at odd hours — how warm is warm enough, whether a quiet day is worry or rest — and KinsLe's Kinny, the built-in assistant on her profile, can be asked for guidance in the moment while what you learn stays alongside her records.