Before the storm: secure it, do not empty it

The instinct to resist

The first idea people have when serious weather is forecast is to lower the water, on the reasoning that the pool will overflow. It is understandable and it is backwards.

Water is what holds an above-ground pool in place. A 15-foot pool holding 3,955 gallons is about 16 tons of ballast sitting on the frame, and it is the reason a light bolted structure stays where you put it in a gale. Remove a substantial part of that and you have a large, light, wind-catching object with a liner that is no longer under even load.

Rain overflowing the pool is a manageable nuisance — it dilutes and acidifies the water, which is a morning of chemistry rather than a disaster, as our after heavy rain guide covers. A pool that moves is not.

The checklist, in the order that matters

1. 1

   Clear everything loose out of and around the pool

   Floats, toys, the net and pole, the vacuum head, chairs, tables, the thermometer. Anything that can be picked up by wind is a projectile, and anything left in the pool is going to be against a liner in a storm. Bring it inside, not just to the side of the house.
2. 2

   Take the solar cover off and put it away

   A bubble cover is designed to float freely; it is not designed to be secured and it makes an excellent sail. Remove it, fold it loosely and store it. Do not attempt to tie it down — you will lose the cover and possibly whatever you tied it to.
3. 3

   Remove the ladder

   It lifts out, it is light, and in wind it is a heavy object next to a vinyl liner. It also removes the way into the pool, which is a sensible state to leave things in when nobody is going to be watching. Our ladder guide covers why removability is a feature worth having anyway.
4. 4

   Kill the power, then disconnect the pump

   Switch off at the outlet first, then unplug. If the pump can be disconnected and brought inside, do that — it is the most damage-prone item in the system and the easiest to protect. Our electrical safety guide covers why nothing should be left energized beside a pool in weather.
5. 5

   Shock the pool before it hits, if there is time

   A storm dilutes your chlorine and delivers a large organic load at the same time. Going in with a healthy level rather than a mid-week trough means the pool is far better placed the next morning. Dusk, with the pump running, before you disconnect it.
6. 6

   Leave the water level alone

   Or, at most, lower it slightly if it is already near the top of the skimmer opening. Do not empty the pool, and do not drop it below the middle of the skimmer — that is both unnecessary and, for the pump you are about to reconnect, unhelpful.
7. 7

   Photograph everything

   Two minutes, from several angles, including the surrounding ground and any existing damage. If there is an insurance conversation afterwards, this is the evidence that makes it short.

What about the winter cover?

A winter cover is built for months of weather and is secured with a cable and winch or wraparound straps, so it is a genuinely robust piece of kit. But putting one on for a storm in the middle of a season is not usually the right move: a cover on an open pool with warm water is the start of the biological problem our cost of a bad close guide describes, and fitting one properly is not a job to rush in a rising wind.

If the storm is arriving at the end of the season and you were closing soon anyway, then bringing the close forward is a reasonable decision — and our winterizing guide is the sequence. If it is July, secure everything else and leave the pool open.

Afterwards

Do the safety checks before the chemistry. Look for downed power lines and do not approach the pool or any electrical equipment if there is any doubt — that is an emergency call, not a homeowner assessment. Check the pool structure for movement, leaning or bulging before anyone gets in, and check the ground around it for washout or undermining, which is where a storm does its quiet damage.

Then the water. A storm dilutes chemistry, pushes pH and alkalinity down and delivers whatever was on the surrounding ground into the pool. The recovery order matters: debris out first, then circulation, then test everything, correct total alkalinity, then pH, then shock at dusk and filter continuously. Our after heavy rain guide is the full sequence, and the cartridge will need attention afterwards.

Reconnecting the pump

Check the housing and hoses for damage before restoring power, make sure the water level is back at the middle of the skimmer opening, and prime it properly rather than switching it on and hoping — these pumps are cooled by the water passing through them and running dry damages them quickly. Our pump troubleshooting guide has the priming sequence, and the pump lifespan guide covers why running dry is the fastest way to end one.