I’ve been servicing pools in East Honolulu since 2000, and every storm season brings the same frantic calls. A homeowner wakes up the morning after a big system rolls through, walks out to the lanai, and sees something that barely resembles a swimming pool. Branches floating. Water the color of coffee. The pump making a sound it shouldn’t be making. Or worse, not making any sound at all.
The good news is that most storm damage to pools is recoverable. The bad news is that the order you tackle it matters. Do things in the wrong sequence and you waste chemicals, risk equipment damage, or make the problem harder to fix. This is the exact recovery checklist I follow after every major weather event across Hawaii Kai, Portlock, Kahala, and the rest of our East Honolulu service area.
What Storms Actually Do to Your Pool
Before jumping into the recovery steps, it helps to understand what just happened to your water. A storm hits your pool on multiple fronts simultaneously, and each one creates a different problem.
Rainwater dilution is the most immediate issue. Hawaii rain is slightly acidic, usually around pH 5.0 to 5.5. A few inches of rainfall can dilute your chlorine by half and drag your pH down below the safe range. That acidic water starts attacking metal fixtures, plaster surfaces, and anything else it touches.
Debris loading is the visible damage. Palm fronds, plumeria branches, leaves from monkeypod trees, loose landscaping material. All of it lands in the pool and starts decomposing. Decomposing organic matter consumes chlorine and creates phosphates that feed algae. The longer debris sits in the water, the worse the chemistry gets.
Runoff contamination is the one people miss. Stormwater doesn’t just fall from the sky. It flows off your deck, your yard, your neighbor’s yard. It carries fertilizer, pesticides, dirt, oil from driveways, and anything else in its path. In areas with exposed volcanic soil, that runoff is loaded with iron-rich red dirt that stains surfaces and turns water murky.
Power surges and outages affect your equipment. A power surge during a lightning strike can fry pump motors, control boards, and salt chlorine generators. Even a simple power outage stops circulation, which means your pool sits stagnant with all that contamination and no filtration running.
Algae gets its window. With chlorine diluted, debris feeding it nutrients, warm water temperatures, and no circulation during outages, algae can establish itself in as little as 24 hours. I’ve seen pools go from clear to green overnight after a big Kona storm.
The Step-by-Step Recovery Checklist
Here’s the order that matters. Don’t skip ahead.
Step 1: Safety First
This is not optional. Before you touch anything near your pool or equipment pad, check for downed power lines, fallen trees leaning against structures, standing water near electrical panels, and broken glass or sharp debris on the deck. If you see any electrical hazard, stop and call your utility company. A pool is not worth risking electrocution.
Check the area around your equipment pad specifically. Water pooling near electrical connections is dangerous. If there’s any doubt, leave the breaker off until a licensed electrician clears it.
Step 2: Leave the Pump Off (For Now)
Your first instinct will be to turn the pump on and start circulating. Resist it. If you power up the pump with large debris still in the pool, you risk clogging the impeller, damaging the pump basket, or pulling something into the plumbing that creates a blockage. If there was a power surge, turning on the pump could reveal a fried motor the hard way.
Check the pump strainer basket first. Clear any debris that washed into it. Check the skimmer baskets too. Look at the pump motor for any visible damage, scorch marks, or water intrusion. If everything looks clean and dry, you can move to the next step.
Step 3: Remove Large Debris by Hand
Get a leaf net or skimmer net and pull out everything you can see. Branches, leaves, toys, furniture cushions that blew in. Whatever is floating or sitting on the bottom. The goal is to remove the bulk organic load before you start the pump, so the filter doesn’t immediately overload.
Don’t worry about making the pool look perfect at this stage. You’re removing the big stuff to protect your equipment and give chemicals a fighting chance.
Step 4: Power Up and Run the Pump
Once the baskets are clear and large debris is out, turn on the pump. Listen for unusual sounds. Grinding, screeching, or humming without the motor turning all indicate problems. If the pump starts and runs normally, let it go. You want continuous circulation from this point until the water clears.
If the pump won’t start or sounds wrong, you’re looking at a potential equipment repair situation. A power surge can damage the motor capacitor, the control board, or the winding insulation. Don’t keep trying to restart a pump that won’t run. Call a professional.
Step 5: Clean or Backwash the Filter
Your filter is about to do heavy work. If it’s already dirty from before the storm, clean it first. For cartridge filters, hose down the element. For DE filters, backwash and recharge with fresh DE. For sand filters, backwash until the sight glass runs clear.
You may need to clean the filter multiple times over the next few days as it pulls suspended particles out of the water. Check the pressure gauge. When it rises 8 to 10 PSI above the clean starting pressure, it’s time to clean again.
Step 6: Test and Correct Water Chemistry
Now that circulation is running and the filter is clean, test your water. Here’s what you’re likely to find after a major storm and what to do about it.
pH will be low. Rain pushes it down. Add sodium carbonate (soda ash) to bring pH back to the 7.4 to 7.6 range. Don’t add too much at once. Raise it in increments and retest.
Free chlorine will be low or zero. This is the big one. Shock the pool. I use calcium hypochlorite for storm recovery because it works fast and adds some calcium back to water that rain has diluted. Aim for at least 10 ppm for a proper shock treatment. If the water is visibly green, you may need even more. Our green pool recovery guide has the detailed protocol for severe cases.
Total alkalinity will be low. Rain dilutes it. Add sodium bicarbonate (baking soda) to bring it back to 80 to 120 ppm. Correct alkalinity before making final pH adjustments, since alkalinity acts as a buffer.
Cyanuric acid may be diluted. If the storm added a significant volume of rainwater, your CYA levels dropped proportionally. Test and add stabilizer if it falls below 30 ppm. Without it, the chlorine you just added will burn off in hours under Hawaii’s sun.
Step 7: Check Equipment Thoroughly
With the immediate water crisis handled, do a full equipment inspection. Look for these specific issues.
Pump motor: check for water intrusion at the back end where the electrical connections are. Look for corrosion on the motor shaft seal. Listen for bearing noise.
Heater: if you have a gas or electric heater, check for water in the cabinet. Look at the heat exchanger for debris blockage. Don’t fire it up until you’ve verified the gas connections (if applicable) and cleared any debris from the burner tray.
Salt cell: if you have a salt system, check the cell for debris and inspect the wiring connections. Power surges frequently damage salt chlorine generators.
Automation systems: check your controller, timer, or automation panel. Power surges love to fry circuit boards. If the display is blank or showing errors, the board may need replacement.
Step 8: Monitor for 48 to 72 Hours
Storm recovery isn’t a one-and-done fix. Test your water again 12 hours after the initial treatment. Then test daily for the next two to three days. Chlorine demand will be elevated as all that organic matter gets oxidized. You may need to add chlorine two or three more times before levels stabilize.
Keep the pump running 24 hours a day until the water is clear. Clean the filter whenever pressure rises. Watch for algae developing on walls or steps, especially in shaded areas.
Hurricane Prep vs. Tropical Storm vs. Heavy Rain
Not all storms are equal, and your response should scale with the severity.
Heavy rain (1 to 3 inches) is the most common scenario. Chemistry disruption and debris are your main concerns. The checklist above handles it. You can usually recover in 24 to 48 hours.
Tropical storms bring sustained winds, heavier rain, and more debris. The same checklist applies, but expect more equipment stress. Windblown debris can damage pump enclosures and crack PVC pipe fittings. Budget extra time for the equipment inspection.
Hurricanes and major Kona storms require pre-storm preparation. Before the storm hits, shock the pool heavily (raise chlorine to 10+ ppm), remove all loose items from the pool area, turn off the pump and breaker, and do not drain the pool. An empty or partially drained pool can pop out of the ground when the water table rises during heavy rain. After a hurricane, follow the full checklist above but add a professional equipment inspection before powering anything on. Surge damage is common and not always visible. I cover Kona wind events in more detail in a separate post, since they bring their own unique set of problems.
When to Call a Pro vs. Handle It Yourself
Most post-storm pool recovery is manageable for a handy homeowner who knows their way around basic chemistry. If you can test water, add chemicals, and clean a filter, you can handle a typical rain event.
Call a professional when any of these apply. The pump won’t start or makes abnormal sounds. You see scorch marks or smell burning near electrical components. The water is so green or brown that you can’t see the bottom. You’ve shocked twice and chlorine still won’t hold after 24 hours. Any structural damage is visible on the pool shell, decking, or plumbing.
I get the most calls after the first big Kona storm of the season, usually from homeowners who waited too long to address the initial damage. Waiting three or four days turns a straightforward recovery into a week-long project with three times the chemical cost. Time works against you in Hawaii’s warm climate. Algae doesn’t wait.
Paul’s Storm Season Advice
After 26 years of post-storm pool recoveries in East Honolulu, here’s what I tell every client at the start of storm season.
Keep a storm kit ready. A jug of liquid chlorine, a bag of soda ash, a fresh test kit, and a leaf net. When the storm passes, you want to act within hours, not drive to the pool store the next day alongside everyone else on the island.
Know your equipment. Understand which breaker controls your pool pump and how to manually override your timer or automation system. During recovery, you want the pump running continuously, not shutting off on a schedule.
Don’t panic about the appearance. A pool that looks terrible after a storm is usually fine structurally. The water is fixable. It’s the equipment damage that’s expensive, and that’s what you should inspect carefully.
For a broader look at how Hawaii’s climate affects every aspect of pool care, including the storm-related challenges covered here, read our complete guide to pool maintenance in Hawaii’s unique climate. It covers water chemistry, algae prevention, equipment protection, and seasonal care in detail.
If you’re in East Honolulu and want storm season peace of mind, get a quote from Koko Head Pool Service. We’ve been keeping pools clear through every storm season since 1995.
