The first warm weekend after a long winter — I get it. You want to take your dog to the park, let the cats patrol the patio, stay outside until it gets dark. I feel it every single spring. Last April, Benny and I were outside for three hours on the first genuinely warm day and I completely forgot to bring water. He was fine — beagles are sturdy and he found a puddle, which, you know, wasn't ideal — but the point is, warm weather has a way of making you feel like the rules don't apply anymore.
They do. They just change.
Spring and summer bring a specific set of risks that are easy to overlook when you're busy enjoying the fact that it's finally not gray outside. This guide covers all of them — not to scare you, but because a little awareness in April means a much easier summer for everyone.
The Warm-Weather Mindset Shift
Here's the thing about seasonal pet hazards: most of them aren't mysterious. Hot pavement, ticks, standing water in yard toys — you already know these are problems. The challenge is that they come back around so gradually each year that it's easy to be caught off guard.
I think of spring as a re-orientation period. You're not doing anything radically different from what you do in summer — you're just getting your systems back in place. Flea prevention back on schedule. Water bowl refilled more frequently. Yard check before you let the dogs out. It takes about a week to rebuild the habits, and then it's automatic.
Summer is maintenance. By July, this is just how you do things.
Temperature and Heat: The Biggest Risk
Heat is the most urgent warm-weather concern for pets, and it catches people by surprise more than anything else.
Dogs and cats don't cool down the way we do. Dogs pant to release heat — it works, but it's less efficient than sweating, and it fails fast when the air itself is hot and humid. Cats primarily cool by grooming (saliva on fur evaporates) and seeking shade. Neither system handles extreme heat as well as we'd like.
Signs of heat stress
You want to catch heat stress early, before it becomes heatstroke:
- Excessive panting that won't slow down even in shade
- Drooling more than usual
- Restlessness or agitation (they can't get comfortable)
- Gums that look red or tacky instead of moist and pink
- Slowing down, stumbling, or refusing to move
Once a pet reaches true heatstroke — unresponsive, vomiting, collapsing — it's an emergency. Get them to a vet immediately. Cool them with lukewarm (not ice cold) water on the way. Read more in the dedicated how to protect your pet from heatstroke guide.
The car rule, full stop
You've heard this. I'm going to say it anyway because I still see people make this mistake: never leave a pet in a parked car in warm weather.
On a 75°F (24°C) day, the inside of a car can reach 100°F (38°C) within 20 minutes. On an 85°F (29°C) day, it hits 120°F in under 30 minutes. Cracking the windows doesn't meaningfully change this. The math is grim and consistent.
If you can't bring your pet inside with you, leave them at home.
Hot pavement
This one sneaks up on people. The air temperature might feel reasonable, but asphalt and concrete absorb and radiate heat much more than the air does. On a sunny 85°F day, pavement can be 140°F or hotter — enough to cause burns in as little as 60 seconds.
The quick test: put the back of your hand on the pavement for 7 seconds. If you can't hold it there comfortably, your dog can't walk on it comfortably either. Walk early morning or evening when surfaces have cooled, or stick to grass and shaded paths.
Fleas, Ticks, and Mosquitoes
Spring is when the parasites wake up too. This is not the fun part of warm weather, but it's genuinely important — and if you get ahead of it, it's not a big deal.
Fleas
Fleas thrive in warm, humid conditions. They don't just affect outdoor pets — they hitch rides inside on clothing and pets, then set up shop in carpet, bedding, and upholstery. An infestation is much harder to deal with than prevention, which is why year-round prevention or at least resuming it in early spring is the standard recommendation.
Talk to your vet about what's right for your situation — there are collar-style options, spot-on treatments, and oral medications, and they vary in how they work and what they cover.
Ticks
Ticks are active whenever temperatures are above freezing, but their populations spike in spring and early summer, and then again in fall. If your dog spends time in woods, tall grass, or brushy areas — or if your yard backs up to those things — do a tick check after every outing.
Run your fingers through the fur slowly, paying attention to areas where ticks like to hide: around the ears, between the toes, in the groin area, around the tail, under the collar. A tick that's been crawling for less than 24 hours hasn't attached yet — remove it before it does.
If you find an attached tick, use fine-tipped tweezers, grasp it as close to the skin as possible, and pull upward with steady pressure. Don't twist, don't use petroleum jelly, don't burn it. Put the tick in a sealed bag in case your vet wants to identify it later.
For more on managing the full flea and tick season — products, timelines, yard treatment — see the surviving tick and flea season guide.
Mosquitoes
Mosquitoes transmit heartworm. Heartworm is serious, and prevention is dramatically easier than treatment. If your dog isn't on year-round heartworm prevention, spring is the right time to start (and have them tested first if they've had a lapse in coverage). This is a vet conversation.
Cats can get heartworm too, though it's less common — and there's no approved treatment for cats, which makes prevention even more important if you have outdoor or indoor-outdoor cats.
Spring Allergies
Both dogs and cats can have environmental allergies that peak in spring. Unlike human hay fever, which usually shows up as sneezing and watery eyes, pets more often show allergies through their skin — itching, redness, ear infections, and obsessive licking or chewing at their paws.
If your pet suddenly starts scratching more in spring, or their paws look red and irritated, or they're shaking their head constantly, allergies are worth putting on the radar. Your vet can help sort out what's driving it and whether medication or other management is appropriate.
Water Safety
Summer and water go together. Dogs especially love to swim, splash, and drink from whatever questionable source is nearest. Some things to know:
Fresh water bodies (lakes, ponds, rivers) can carry bacteria and parasites — Giardia and leptospirosis are two concerns. Leptospirosis in particular can be serious and is more common in areas with wildlife. Your vet can advise on the leptospirosis vaccine if your dog is in high-exposure situations.
Blue-green algae blooms in warm, still fresh water and is toxic to dogs (and can be fatal). It looks like greenish scum on the water surface. Avoid any water that looks like this, and rinse your dog immediately if they've been in water that might be affected.
Ocean swimming has its own set of considerations — salt water intake, strong currents, waves — especially for dogs who aren't strong swimmers.
Pools may be fine for dogs, but chlorine is a mild irritant, and not all dogs know how to exit a pool safely. If you have a pool, make sure your dog can find and use the steps.
Always bring fresh water for your dog on outings so they're less tempted to drink from wherever they find.
Yard Safety
Your backyard can become a hazard zone in spring without much warning.
Fertilizers, pesticides, and herbicides are often applied in spring. Many are toxic to pets — and pets walk through treated areas, then lick their paws. Keep pets off treated lawns until they're dry and fully absorbed, and be cautious with any chemical you're applying. Read labels.
Mulch — specifically cocoa mulch — is toxic to dogs. It smells like chocolate because it's a byproduct of chocolate processing, and dogs find it attractive. If you're mulching your garden, use a pet-safe variety.
Garden plants are a big one. Several common spring and summer plants are toxic to pets: lilies (highly toxic to cats — even small exposures can cause kidney failure), tulip bulbs, azaleas, rhododendrons, sago palms, and foxglove are among the most dangerous. If you're planting a garden, it's worth cross-referencing your plant list against a toxicity database — the ASPCA maintains a comprehensive one.
Standing water in plant saucers, bird baths, kiddie pools, and gutters breeds mosquitoes. Dump and refill regularly.
Fence checks — gaps appear over winter from frost heave and settling. A determined dog or an escape-artist cat can find openings you didn't know were there. Walk your fence line in spring.
Summer Grooming
Counterintuitively, shaving a double-coated dog in summer doesn't actually help them stay cool — and can disrupt their coat's ability to regulate temperature and protect from sunburn. Talk to a groomer before making drastic coat decisions.
What does help:
- Regular brushing removes dead undercoat that traps heat
- Keeping ear canals clean (warm weather and swimming increase ear infection risk)
- Trimming fur between paw pads (collects burrs, foxtails, and hot debris)
- Making sure nails are trimmed so paws land properly
For cats, this usually means more frequent brushing during shedding season and paying attention to their grooming habits — a cat who's grooming less or over-grooming may be stressed or dealing with skin issues.
Summer Hydration
The most underrated warm-weather tip: more water, all the time.
Pets need more water in heat than they do in mild weather, and they're not always great at communicating when they're thirsty. Make sure water bowls are in the shade (water in direct sun heats up and becomes unappealing), refilled more frequently, and available in multiple locations if you have a multi-pet household.
Wet food contributes meaningfully to hydration — if your pet doesn't drink much water and you're worried about them in the heat, it's worth adding wet food to the rotation.
Signs of dehydration: skin that doesn't spring back quickly when gently pinched (the "skin tent" test), dry or sticky gums, lethargy, sunken eyes.
Indoor Cats in Summer
Indoor cats have heat exposure risks too, especially in apartments without air conditioning. Some strategies:
- Keep curtains drawn on sun-facing windows during the hottest part of the day to reduce solar heat gain
- Create cool spots — a tile floor, a cool wet towel they can lie on, a spot near a fan
- Make sure fresh water is always available (some cats are picky about warm water)
- Watch for signs of overheating: excessive panting (unusual in cats and always a concern), drooling, listlessness
The good news is that cats are pretty good at finding the coolest spot in a space. Miso has identified the exact sliver of kitchen tile that stays coolest in summer and she claims it every afternoon like it's been deeded to her.
Quick Reference: Warm-Weather Hazards by Season
Early spring:
- Resume flea and tick prevention
- Check for toxic plants being planted in yard/garden
- Inspect fence for winter damage
- Start scheduling earlier/later walks on warming days
Late spring / early summer:
- Hot pavement checks before walks
- Watch for blue-green algae if near fresh water
- Apply lawn treatments only when pets can be kept off
- Increase water bowl frequency
Peak summer:
- Never leave pets in parked vehicles
- Limit exercise to cooler parts of day
- Provide shade and cooling options at all times
- Watch for heat stress signs during any outdoor activity
FAQ
Q: How do I know if my dog is too hot?
Excessive panting that won't slow down even in shade, combined with lethargy or unsteadiness, is the biggest warning sign. Gums that look bright red or feel tacky instead of moist are also a red flag. When in doubt, get them to a cool, shaded area with water and monitor closely. If they don't improve within 10-15 minutes, contact your vet.
Q: Can cats get heatstroke?
Yes, though it's less common than in dogs because cats are better at finding shade and managing their activity in heat. It can happen in hot cars, poorly ventilated rooms, or during high-heat outdoor exposure. Signs are similar to dogs: panting (which is unusual for cats and should always be taken seriously), drooling, lethargy. Same response: cool area, fresh water, vet if not improving.
Q: Do I need to put sunscreen on my pet?
Pale-skinned, short-haired, or hairless pets can get sunburned on exposed areas — nose, ears, belly. If your pet has pink skin or a thin coat, there are pet-formulated sunscreens (NOT human sunscreen — some ingredients, like zinc oxide and salicylates, are toxic to pets). Talk to your vet if you think this applies to your animals.
Q: My cat is indoor-only — do I still need flea prevention?
It's worth discussing with your vet. Fleas can enter homes on clothing, on other pets, or through small gaps. Whether prevention is necessary depends on your local flea burden and your household. A vet who knows your situation is better placed to advise than a general rule.
Q: At what temperature is it too hot to walk my dog?
There's no single threshold — it depends on humidity, your dog's breed, coat, age, and fitness level. As a general guide: if the heat index (temperature + humidity) is above 90°F (32°C), high-risk dogs (brachycephalic breeds like bulldogs and pugs, elderly dogs, puppies, dogs with heart or respiratory conditions) should skip the walk or keep it very short. For lower-risk dogs, the pavement test matters more than the air temperature — if it's too hot to hold your hand on the pavement, it's too hot for their paws.
Q: What should I have in a warm-weather emergency kit for my pet?
A portable water bowl and enough water for the outing, a towel for wet cooling (and cleanup), your vet's contact info, and a pet first aid guide are a reasonable start. If you hike or do extended outdoor activities, a pet-specific first aid kit is worth having.
When the weather warms up, the goal isn't to keep your pets inside and bubble-wrapped — it's to stay a step ahead of the things that can turn a good day into an emergency. Most of this is quick to manage once it's habit. And fall brings its own set of considerations — the fall and winter pet care guide covers everything on the cold-weather side.
Enjoy the sun. Just bring water.