Pool Care Blog

Preparing Your Pool for Houston Hurricane Season: Before, During & After the Storm

Seasonal · March 2026 · 6 min read

Hurricane season runs June through November, and if you own a pool in Friendswood, League City, Pearland, or anywhere along Galveston Bay, the season's first named storm is a matter of when, not if. Here's what most homeowners don't realize: the worst pool damage we see after a storm usually wasn't caused by the storm. It was caused by what the homeowner did — or didn't do — in the 48 hours around it.

This guide covers all three windows: before the storm, during it, and the first 48 hours after. Get those right and your pool comes through fine. Get them wrong and you're looking at weeks of green water, a flooded pump motor, or an insurance claim.

Before the Storm: Prep (48 Hours Out)

DON'T Drain Your Pool

Leave your pool full or nearly full. The weight anchors it.

Lower the Water Level (6–12 Inches)

Here's the balance: a full pool is anchored, but an overfull pool will overflow and damage surrounding property during heavy rain. Lower it just enough to allow rain inflow without spillover.

Process: Use your pump's drain function or a submersible pump. Stop when water is 6–12 inches below the tile line.

Super-Chlorinate (Shock Treatment)

A few days before the storm, shock your pool with 2–3x the normal dose. If your pool normally needs 1 lb of shock, add 2–3 lbs.

Why? Hurricanes bring debris (leaves, dirt, organic matter). High chlorine levels help fight the bacterial and algal load that's about to hit. It's preventative medicine.

Secure Loose Equipment

• Remove floats, noodles, toys, and inflatables (they'll end up in the next county)
• Remove the skimmer basket (it can damage the pump or get ejected)
• Remove any pool furniture or deck chairs
• Cover the pump and filter with tarps if possible

Turn Off Power at the Breaker

This is critical. Storm surge and flooding can short out electrical equipment. High winds can snap branches into the pump. Turn off power to:

• Pump and motor
• Filter heater (if you have one)
• Chlorinator or salt cell (if saltwater)
• Any automated controllers

Leave the breaker off until 24 hours after the storm passes and you've inspected equipment.

During the Storm

Don't touch your pool. Stay indoors. Your safety comes first. The pool can wait.

Expect:

• Heavy debris (branches, leaves, dirt) in the water
• Water level to rise significantly (from rain and storm surge)
• Possible equipment damage from wind or floating debris
• Power outages lasting hours or days

After the Storm: Recovery (First 24–48 Hours)

1. Assess Safety

Before you even look at the pool:

• Check for downed power lines or electrical hazards
• Inspect the pump/filter area for damage or debris
• Ensure the breaker and all electrical is dry before restoring power

2. Remove Debris

Use a skimmer net to remove floating debris (leaves, branches, wood). If water level is 2+ feet above normal, use a submersible pump to drain excess water safely into the yard (not toward the house foundation).

Target water level: Back to 6–12 inches below tile line.

3. Chemical Rebalancing (The Critical Step)

Rainwater is pH-neutral but lacks chlorine and has no mineral balance. After 8–48 hours of heavy rain, your pool is chemically diluted.

Recovery sequence:

1. Test the water: Free chlorine, pH, alkalinity, calcium hardness
2. Shock the pool: Add 1.5–2x normal dose to handle organic debris and algae risk
3. Adjust pH: Use acid or base to target 7.2–7.4
4. Address alkalinity: Target 80–120 ppm (dilution often lowers it)
5. Re-test in 24 hours and adjust again if needed

Post-hurricane water often has high organic load (pollen, leaves, dirt). Expect to shock multiple times over 2–3 days.

4. Check Equipment Before Restarting

Do not just flip the breaker back on.

• Pump intake: Ensure the pump housing is dry and no water has seeped into the electrical box
• Filter pressure: If flooded debris entered, filter pressure will be high; backwash before starting the pump
• Motor housing: Look for water stains, rust, or visible damage
• Chlorinator cell (if saltwater): Inspect for damage; may need replacement after saltwater ingress
• Test run: Turn on pump for 5 minutes with the breaker box door open. Listen for unusual noises. Turn off immediately if you hear grinding or smell burning

5. Dealing with Floodwater Contamination

If your pool was flooded with contaminated floodwater (from street runoff, sewage, or saltwater inundation), you need professional help.

Signs of severe contamination:

• Water smells foul or chemical
• Visible sludge or discoloration that won't clear with shocking
• Equipment has saltwater corrosion (white crusty buildup)
• Water pH is way out of range or won't stabilize

In these cases, you may need to partially or fully drain and refill. Professional water testing and treatment is recommended for League City, Galveston Bay, and other coastal areas where saltwater intrusion is a risk.

Insurance & Documentation

Before hurricane season (May), take photos of your equipment:

• Pump and motor serial numbers
• Filter age and model
• General pool condition

After a major storm that causes damage, document with photos and get estimates for repairs. Some homeowner policies cover equipment damage from hurricanes (though deductibles are often high).

One More Thing Worth Knowing

After a major storm, every pool company in Houston gets slammed at the same time. Recovery calls stack up for weeks, and one-time cleanups go to the back of the line. The homeowners whose pools recover fastest are the ones already on a weekly route — their tech knows the pool, shows up on schedule, and handles the shock-test-rebalance cycle without a phone call. If this guide felt like a lot, that's the simpler version of hurricane prep: have someone whose job it is.

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Or call (281) 624-6191.

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