keeping your rabbit safe in the heat
Rabbits are prey animals built for temperate climates. They are not built for Southern Californian heat waves. When temperatures rise, even briefly, a rabbit's body has very few tools to compensate: they cannot pant effectively, they cannot sweat. Their primary heat dissipation mechanism is their ears, and in extreme heat, this will not be enough.
Heat stroke in rabbits can progress from subtle signs to life-threatening distress in under an hour. Knowing what to watch for - and acting before you see the worst signs - is the difference between a rabbit who recovers and one who does not.
Safe Temperatures
The safe temperature range for rabbits is 60-72°F. BCB maintains both our Viking + Montair locations between 70-72°F year-round for boarding guests: cool enough to prevent heat stress and consistent enough to avoid the fluctuations that compromise immune function.
At 80°F, most rabbits begin to show signs of heat stress. At 85°F and above, heat stroke is a serious and immediate risk. Bunnies left in a car, a garage, or a room without air conditioning during a heat event can reach dangerous temperatures within minutes.
What Accelerates Heat Risk
Obesity: overweight rabbits have more insulation and less surface area relative to body mass
Breed Type (like rex rabbits and angoras): thicker coats trap heat
Elderly Rabbits: thermoregulation becomes less efficient with age
Immunocompromised Rabbits: particularly cardiac or respiratory disease
Poorly Ventilated Spaces: a room that feels comfortable to you may be significantly warmer at rabbit level
Signs of Heat Stress + Heat Stroke
Early Signs: Act Now
Ears that are hot and red: the ears are a rabbit's primary cooling mechanism - when they are working overtime, they will be visibly flushed and warm to the touch
Rapid, shallow breathing
Lethargy or reluctance to move
Wet nose: rabbits do not sweat, so moisture around the nose in heat is a sign of distress
Stretched out flat on a cool surface: rabbits instinctively try to maximize contact with cooler ground
Advanced Signs: Emergency
Open mouth breathing: rabbits are obligate nasal breathers - open mouth breathing is always a medical emergency
Seizures or convulsions
Unresponsiveness or collapse
Blue or pale gums
If your rabbit is showing advanced signs, do not wait. Get them to an exotic vet or emergency clinic immediately. Wrap them loosely in a cool (not cold!) damp towel on the way. Do not submerge them in cold water - this can cause shock.
The GI Stasis Connection
Heat stress suppresses gut motility. A rabbit who is heat stressed is a rabbit at elevated risk for GI stasis - even after the temperature has come down. If your bunny survives a heat event but stops eating or producing droppings in the following 24-48 hours, treat it as a potential stasis situation and contact your exotic vet.
How to Keep Your Rabbit Cool
Turn up the AC
If your home does not have AC, your rabbit needs to be somewhere that does - a friend's home, a family member's, or a climate-controlled boarding facility.
Make frozen water bottles
Fill plastic bottles with water and freeze them. Place them wrapped in a thin towel in or near your rabbit's enclosure - they will press against them to cool down. Replace these bottles as they thaw; this is one of the most effective and accessible cooling tools available.
Provide ceramic tiles
Unglazed ceramic tiles placed in the freezer for 30 minutes and then placed in the enclosure give rabbits a cool surface to lie on. Many rabbits will seek these out instinctively.
Offer fresh cold water
Dehydration accelerates heat stress. Make sure your rabbit has constant access to fresh, cold water. Add ice cubes to the water bowl to keep it cool longer (especially if you will not be around to change out warm water). Also, soaked leafy greens contribute meaningfully to fluid intake.
Bring them indoors
We highly encourage that rabbits are indoors only - but we understand that some families have created outdoor spaces their rabbits love. During a heat wave, unless there is a space for your rabbits to have air conditioning access, please bring them inside.
Avoid direct sunlight
Even in an air-conditioned home, a rabbit enclosure near a window in direct afternoon sun can heat up significantly. Move enclosures away from direct sun exposure during peak heat hours.
Cool their ears
Gently dampen your rabbit's ears with cool water - wet a paper towel and wring it out so it's damp, not dripping. The ears are the primary thermoregulation site, and cooling them directly supports heat dissipation. Do not soak your rabbit or wet the body extensively, as this can cause stress and rapid temperature changes.
What Not to Do
Do not use ice baths or cold water immersion
The instinct is to cool a heat-stressed rabbit quickly - but sudden cold causes vasoconstriction and can send a rabbit into shock. Cool and gradual is the correct approach. Cool damp towel, frozen water bottle, cool tile - not cold water bath.
Do not leave them unattended for extended periods
During a heat wave, rabbits should not be left alone for longer than a standard work or school day - roughly 10 hours including commute. Heat conditions can change quickly, water bowls can empty or tip, and a rabbit in early heat stress needs someone who can intervene. If your schedule requires longer absences, arrange for someone to check in or consider boarding at a climate-controlled facility.
Do not rely on shade alone
If you have outdoor rabbits, shady trees and respite spaces will not be enough during a heat wave. Shade reduces radiant heat but does not lower ambient air temperature. Your rabbit needs access to a climate-controlled space.
Do not assume a fan is enough
Fans move air but do not lower the temperature of that air. A fan in a 90°F room keeps a rabbit in a 90°F room. If you do not have AC, your rabbit needs to be somewhere that does.
What BCB Does During a Heatwave
The Bun Chia Burrow maintains a consistent 70-72°F at both of our locations year-round. During heat events, we monitor ambient temperature throughout the hotel and increase check-ins for all guests. Any rabbit or other smalls showing early signs of heat stress receives immediate intervention - cool towels, frozen water bottles, and veterinary contact if signs do not resolve quickly.
If you are boarding with us during a heat event, your rabbit is in a controlled environment. If you are not - please make sure yours are too.
Sources