A rabbit's cooling system is her ears, not her coat
A Dutch rabbit survives a heatwave on shade, airflow, and cold surfaces, because rabbits cannot sweat and pant only as a last resort. Blood vessels in the ears do most of the work, shedding heat when air moves across them, so a Dutch rabbit's enclosure belongs where air circulates in full shade all day — not a hutch that the afternoon sun reaches, and never a shed or garage that turns into an oven by midday. If she lives outdoors, the heatwave plan starts with moving her run into permanent shade or bringing her indoors for the duration.
Frozen bottles, tiles, and the lying-against test
Offer cold she can choose. A large bottle of water frozen solid and wrapped in a thin cloth becomes the classic rabbit cooling post: your Dutch rabbit will press her flank against it if she wants it and move off when she has had enough, and the wrap keeps condensation and cold-burn off her skin. Add a ceramic or stone tile in her usual loafing corner, and a second frozen bottle ready in rotation so one is always cold. Replace bottles as they melt rather than on a schedule guessed in the morning.
Water, food, and the midday pattern of a heatwave day
Refresh both bowl and bottle at least twice daily in a heatwave, because a Dutch rabbit drinks markedly more in heat and a warm, stale bowl discourages the drinking she needs. Keep hay in constant supply and expect her appetite to shift toward the cooler ends of the day; offer her greens rinsed in cool water for the extra moisture. Move exercise to early morning and late evening, on grass in shade, and cancel handling sessions in the hot middle of the day — being lifted and held against a warm body is the opposite of cooling for a rabbit.
Garden rabbits need a decision, not a hope
Watch the forecast for the enclosure, not the house. A hutch that was comfortable at breakfast can be dangerous by two o'clock, so check the actual temperature inside her shelter at midday, in the shade of its own roof, and bring your Dutch rabbit indoors if the shelter cannot stay cool. Flies are the second heatwave enemy: a hot, damp hutch draws them, and a rabbit with any soiled fur is at risk of flystrike, which is an emergency in its own right. Keep her quarters dry, check her rear end daily through the hot spell, and keep bedding fresh.
Heatstroke signs that skip the waiting
Act the moment a Dutch rabbit pants with her mouth open, drools, wobbles, stretches out limp and unresponsive, or stops eating entirely — move her to a cool room, dampen her ears with tepid (never icy) water, and phone the vet immediately while you travel if advised. Do not immerse her in cold water; the shock of a plunge harms a rabbit in heatstroke. A rabbit who is bright, eating, and choosing her frozen bottle voluntarily needs management, not emergency care.
In a busy household, KinsLe's Care Teams makes the Dutch rabbit's midday shade, bottle, and rear-end checks an assigned duty for a named family member, marked complete with a timestamp so no check is assumed done.