Water-Damaged Computer? What to Do — and What Never to Do (2026)

If your computer got water damaged, the single most important rule is: do not power it on to “see if it works.” Water plus electricity is what kills electronics — a wet machine that stays off is often recoverable; a wet machine that gets powered on usually isn’t. Unplug it, pull the battery if it’s a laptop, and let a technician assess it dry. Here’s the full sequence, including what the odds of recovery really look like.

First 10 minutes

1. Disconnect power at the wall. If it’s a laptop, remove the battery if it’s removable; if not, don’t press the power button at all.
2. If it’s storm or flood related, photograph everything where it sits — your insurance claim needs pictures before cleanup.
3. Move the device somewhere dry. Stand a laptop in an inverted “V” (tent) to let water drain away from the board.
4. Remove external drives, USB devices, and memory cards — these often survive even when the machine doesn’t.

What never to do

• Don’t power it on: even days later, until it’s been opened and inspected — invisible moisture and corrosion cause shorts.
• Don’t use a hair dryer or oven: heat warps components and drives moisture deeper.
• Skip the rice myth: rice barely absorbs ambient moisture and adds starch dust to the problem. Open air with a fan does more.
• Don’t charge a wet laptop or phone: lithium batteries that got wet are a genuine fire risk.

Clean water vs. flood water: the odds are different

A splash of clean water on a powered-off machine is often survivable with prompt drying. Hurricane flood water is another story — it’s salty, silty, and contaminated, and it corrodes circuit boards within days. Salt residue keeps conducting electricity even after everything looks dry, which is why flooded electronics that “worked fine for a week” suddenly die. Machines submerged in storm surge are usually totaled as computers — but that’s not the end of the story, because the part that matters most often survives.

Your data is probably fine — if you don’t cook it

Hard drives are sealed, and SSD memory chips tolerate a soaking far better than the rest of the computer. Professional recovery from flooded machines succeeds regularly — as long as nobody powered the drive up wet. If the machine holds anything irreplaceable and you have no backup, do not experiment: every power-on attempt lowers the odds. Take the drive (or the whole machine) to a professional and say the words “it got wet” up front.

Preventing this in the first place is mostly about what happens before the storm arrives — see our guide on how to protect electronics during a hurricane.

For businesses: totaled hardware, documented properly

After a flood, resist the urge to throw ruined machines in the dumpster.

• Inventory everything: document every damaged device with serial numbers and photos — your insurance and tax write-offs depend on it.
• Wipe or destroy drives before disposal: flood-damaged doesn’t mean unreadable, and customer data on a dumpstered drive is a breach waiting to happen.

For the full reopening sequence beyond just the hardware, see our after-the-hurricane IT recovery checklist.