High-risk animals that heat up faster:

• Brachycephalic breeds (French Bulldog, Pug, Persian, British Shorthair) — compressed airways reduce heat dissipation
• Senior pets — reduced thermoregulation
• Overweight pets — insulation effect
• Thick double-coated breeds (Husky, Malamute, Chow Chow)

According to the ASPCA, normal body temperature for dogs is 101–102.5°F and for cats is 100.5–102.5°F. Heatstroke begins when core temperature exceeds 104°F and can become fatal above 106°F. Apartment units — particularly upper floors with southern or western exposure — can reach indoor temperatures 10–15°F above outdoor ambient temperatures when air circulation is poor. In 2026, climate data shows that summer heat events in North America are arriving earlier and lasting longer, making apartment heat safety more relevant than ever.

Small apartments also have limited airflow, meaning body heat from a dog or cat contributes meaningfully to room temperature over a full day. A 50-pound dog generates approximately the same heat output as a large desktop computer running continuously — in a sealed 600 sq ft apartment, this adds up quickly.

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What Are Cooling Your Apartment While You’re Away?

• Leave AC on: Set to 26–27°C (79–80°F) — not off or too high. The incremental electricity cost is minor compared to an emergency vet visit.
• Close sun-facing curtains before you leave: Thermal-lined curtains block the majority of solar heat gain.
• Direct fans at pet resting areas at floor level: Evaporative cooling from fan airflow. Not as effective as AC but better than stagnant hot air.
• Provide multiple water sources: Double water intake in summer. Two water stations minimum — one fountain, one bowl.
• Self-cooling gel mats: Place on tile or hardwood floors. No electricity required.

The ASPCA recommends keeping indoor temperatures at or below 78°F for pets left alone. When air conditioning isn’t available or reliable, a combination of fans, blackout curtains on sun-facing windows, and cooling mats is the most effective passive strategy. Ceramic tile floors are naturally cooler than carpet or hardwood and many pets will self-regulate by lying on them during hot periods — make sure tile areas are accessible and not blocked by furniture or rugs.

For power outages during heat events — increasingly common in 2026 summers — have a contingency plan. Identify a pet-friendly cooling center (a friend’s air-conditioned home, a pet-friendly café, or even a veterinary clinic waiting room) before you need it. A single hot afternoon without AC in a sealed apartment can create dangerous conditions within 2–3 hours.

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What Are Safe Walk Schedules in Summer?

The pavement test: place the back of your hand flat on the pavement. If you can’t comfortably hold it there for 5 seconds, it’s too hot for dog paws. Walk timing:

• Safe: Before 9am, after 7pm (most cities)
• Risky: 10am–5pm in hot weather
• Dangerous: Air temperature above 32°C in direct sun on asphalt

Always bring water on summer walks. A portable dog water bottle is a summer essential. Take shorter, more frequent walks rather than long ones during hot periods.

The AKC recommends the 7-second pavement test: place the back of your hand on the pavement for 7 seconds. If it’s uncomfortable for your hand, it’s too hot for your dog’s paws. Asphalt can reach 140–160°F on a sunny summer day even when air temperature is only 85°F. Burn injuries to paw pads are painful, slow to heal, and often require veterinary treatment. Stick to grassy surfaces or shaded paths when possible, and consider paw wax for additional protection.

Cats that have outdoor access (balconies, open windows) are also at risk during heat waves. Ensure window screens are secure — screens fail more frequently in summer when windows are opened wider. Balcony concrete and metal railings reach dangerous temperatures that can cause paw burns for cats as well.

What Are Recognizing Heatstroke?

Heatstroke signs (go to emergency vet immediately if present):

• Excessive panting — especially if the dog is usually calm
• Thick, ropy, or foamy drool
• Bright red, pale, or blue-tinged gums
• Weakness or staggering
• Vomiting or diarrhea
• Confusion or unresponsiveness
• Collapse

Heatstroke first aid while getting to the vet:

1. Move to a cool area immediately
2. Apply cool (not cold or icy) water to the belly, groin, paws, and neck
3. Use a fan if available to enhance evaporative cooling
4. Do not cover with wet towels (traps heat)
5. Offer small amounts of room-temperature water — don’t force
6. Drive to the emergency vet — don’t delay to see if it improves

For more, see our 15 essential summer pet care tips, how to find emergency vet care in a city, and apartment pet safety tips guides. The AVMA summer safety guide and ASPCA hot weather safety tips are comprehensive resources.