Look, I’ve been maintaining pools in the East Valley for over 21 years. I’ve seen my fair share of Arizona summers, and I know exactly what happens to a pool when the mercury climbs past 110°F.
Today, Wednesday, July 22, 2026, we’ve got a bit of a break with some overcast skies and a "mild" 106°F. But don't let that fool you. The National Weather Service has issued an Extreme Heat Warning starting tomorrow, Thursday, July 23, and running through Monday. We’re looking at highs between 110°F and 115°F across Mesa, Gilbert, Chandler, and Queen Creek.
In this kind of heat, your pool isn't just a place to cool off: it’s a living ecosystem that’s under massive stress. If you don't prep today, you’ll be looking at a green swamp or a burnt-out pump by Sunday. Here are the four practical steps I recommend every homeowner take right now to get ahead of the heat wave.
1. Dial In Your Chemistry (Before the Sun Eats It)
The biggest of all east valley pool problems 2026 is the disappearing act chlorine performs when the UV index hits the roof. When it’s 115°F, the sun acts like a giant vacuum for your sanitizer.
First things first: you need an accurate reading. Put away those cheap test strips; they won’t give you the precision you need for a 115-degree weekend. I always recommend the Taylor K-2006 test kit. It’s the gold standard for a reason. It lets you see exactly where your Free Chlorine and Cyanuric Acid (stabilizer) levels are.
For arizona pool maintenance, your stabilizer (CYA) is your "sunscreen" for your chlorine. If it’s too low (below 30 ppm), your chlorine will be gone in two hours. If it’s too high (over 80-100 ppm), your chlorine becomes "locked" and ineffective. You want that sweet spot around 50 ppm for the peak of summer.
Pro Tip: If your chlorine is low today, add it tonight. Let it circulate while the sun is down so it has a head start before the heat warning kicks in tomorrow morning. Providing effective pool chemistry solutions now prevents a $300 algae cleanup later.
2. Run Your Pump Longer (and Smarter)
I get it: electricity isn't cheap. But a green pool is much more expensive. During an Extreme Heat Warning, your standard 8-hour run time isn't going to cut it.
Set pump speed and schedule from the actual pool and equipment requirements. Confirm adequate flow for filtration, sanitizer, heater and cleaner before lowering speed. No universal air-temperature formula or number of operating hours proves sanitation. Inspect flow, filter condition and water-test results, and use the exact model instructions or qualified assistance. Pentair servicing guidance.
However, don't run it during the heat of the day if you can avoid it. The air is already 115°F; your pump motor generates its own heat, and the sun is beating down on it. That’s a recipe for a failed motor.
Schedule your main filtration cycle to start around 8:00 PM and run through the night. This keeps the water moving when it’s "cooler" and helps with aeration, which can actually drop your water temperature by a degree or two. If you have a pentair rebel pool cleaner, make sure it's running during these cycles to keep the floor clear of monsoon dust that often precedes these heat spikes.
3. Check for Leaks and Evaporation
In a typical gilbert pool maintenance routine, we expect about 1/4 to 1/2 inch of evaporation a day in the summer. When it’s 115°F with low humidity, that number jumps.
The danger here isn't just the water bill. If your water level drops below the skimmer mouth, your pump will start sucking air. Once that happens, the motor will overheat and the internal seals can melt. I see this at least three times a week during July in queen creek pools.
Take five minutes today to:
- Top off your water level to the middle of the skimmer tile.
- Check your auto-filler (if you have one) to make sure the float isn't stuck.
- Keep an eye out for any "unusual" water loss. If you think you have a leak, don't wait until the weekend to find out.
If you aren't sure if you're losing too much water, you can use our Virtual Service Call to show me what’s going on. I can often tell the difference between extreme evaporation and a mechanical leak just by looking at your equipment setup and hearing the symptoms.
4. Leverage Automation for Efficiency
If you’re still out there manually turning valves and clicking breakers in 115-degree heat, you’re doing it the hard way. Pool automation tools are the single best investment for chandler pool service customers who want to survive the summer without a headache.
Systems like the Pentair IntelliCenter allow you to adjust your run times from your phone while you’re sitting in the AC. If you see the forecast jump another two degrees, you can bump up your pump speed or add an extra hour of filtration with one tap.
Automation also allows for "Freeze Protection" in the winter, but in the summer, its "Heater Cool Down" and "Variable Speed" features are what save your equipment. Running a variable speed pump at a lower RPM for a longer duration is significantly cheaper and easier on the hardware than slamming a single-speed pump for 12 hours straight.
Need a Second Opinion?
Preparation is everything when the East Valley turns into an oven. If you go through these steps and something still feels off: maybe your pump is making a high-pitched whine, or your water is looking dull despite perfect chemistry: don't guess.
We offer a Virtual Service Call where you can upload photos and videos of your equipment. I’ll personally take a look and give you a real diagnosis. It’s a lot cheaper than a weekend emergency repair call or a full equipment replacement.
Stay cool out there, East Valley. We'll get through this heat wave one gallon at a time.