A blue tongue skink handles heat the way it handles most problems: it goes underground. In the wild these sturdy Australian skinks ride out the fierce part of the day buried in cool soil or wedged under leaf litter, so in a heatwave your enclosure has to recreate that buried coolness. A skink that can burrow deeply, drink and rest unheated will sail through hot weather; a skink in a shallow, fully heated box cannot.
Depth Is the Cooling System
Make sure the substrate is deep enough for the skink to submerge its whole body, and keep the cool-end portion very slightly moist — not wet — so the buried layer holds a cooler temperature than the surface. A flat tile or slate on the cool end adds a second option: many skinks press their bellies onto cool stone after burrowing stops being enough. Add or deepen a hide at the cool end too, since a skink that feels exposed will pace rather than settle even at a safe temperature.
Relocate the enclosure out of sun-struck rooms if you can; a ground-floor, shaded room can be the difference between coping and crisis for a ground-dwelling lizard.
Cut the Added Heat Honestly
Your skink does not need its usual basking boost when the room itself is hot. Reduce the basking lamp's hours, raise it, or leave it off during the peak days, governed by thermometer readings at the cool end rather than by how the room feels to you. Work to keep the cool end from sitting in the upper eighties Fahrenheit for hours at a time. Ventilation matters for skinks in a way keepers underestimate: open mesh and airflow stop the enclosure becoming a still, humid oven at floor level where this animal actually lives.
Keep the water bowl full, heavy and on the cool side; skinks drink more in heat, and some will sit in a wide shallow bowl. A brief supervised soak in lukewarm water is a fair extra for a restless skink, lifted out as soon as it wants out.
Food and Behaviour in the Heat
Feed smaller meals in the cooler morning or evening, not at midday peak, and do not be alarmed if appetite dips for a few days — a burrowed skink conserving energy in heat is behaving normally, and forcing the issue with rich food helps nothing. What should move you to act is the opposite behaviour: persistent pacing along the glass, repeated attempts to climb, open-mouth breathing at rest, or a normally solid skink gone limp and unresponsive when lifted. Those signs call for gentle cooling in a cooler room and prompt reptile-vet advice, since heat stress in a heavy-bodied skink can tip quickly.
Never cool with ice packs under the animal or cold baths; bring the environment down gradually and let the skink choose its spot within it.
One Plan the Whole Household Can See
Heatwave care fails in the gaps between people — one person turns the lamp back on out of habit while another is mid-plan to leave it off. KinsLe Family Sharing keeps the skink's shared profile carrying the agreed heat notes — lamp off, bowl on the cool side, readings to take — so everyone in the home works from the same page until the weather breaks.