King Tide Season in North Miami: Garage Door Sensors and Wet Floors

Garage door sensors that got wet after flooding often work again once they dry, but salt water can leave a film on the lenses and crust on the wire connections that causes trouble days later. In North Miami that matters most around king tides, which the city describes as a normal occurrence once or twice a year in coastal areas like North Miami.

No city source says king tide water comes into garages, and on most streets it won't. This guide is for homes where water does reach the driveway or the garage floor. It covers what the city says about king tides, which parts of a door sit lowest, and what to check after the water goes down. For repairs, Momentum's garage door repair in North Miami page lists the common ones.

What North Miami says about king tides

The City of North Miami explains on its King Tide page that king tides happen when the orbits and alignment of the Earth, moon and sun produce the year's greatest tidal effects. They bring unusually high water levels and can cause local tidal flooding. The city adds that sea level rise is raising the height of tides over time.

The page also notes that NOAA predicts king tides. For a homeowner, that is the useful part. A king tide isn't a surprise like a summer downpour. It shows up in the tide predictions ahead of time, so there's time to clear the garage floor and get ready a day or two early.

North Miami streets the city lists for king tide flooding

As of November 2026, the city's King Tide page names three places where king tide flooding is expected:

• NE 124th Street in Keystone
• NE 125th Street, near NE 15th Avenue
• NE 135th Street, east of Biscayne Boulevard

The page also says other parts of North Miami may be affected, so a street missing from the list isn't a promise of dry pavement.

The city's advice for residents includes using flood panels or sandbags to protect property in low-lying areas, avoiding parking in low-lying areas and avoiding contact with flood water. If you do touch it, the city says to rinse off with soap and water. Flooding and standing water can be reported to the Public Works Department at 305-895-9878.

If you live on or near one of these streets, watch how close the water gets to your driveway during the next king tide. That tells you more about your own garage than any list can.

The bottom six inches: where water meets the door

Water on a garage floor only has to be a few inches deep to reach the lowest parts of a door. Several of them sit low by design:

• The safety sensors. DASMA, the trade association for door and opener manufacturers, says photo eyes should be installed no higher than six inches above the garage floor. Chamberlain's support guide gives the same limit, 6 inches (15 cm). That keeps them low enough to see a small child or a pet, and it also puts them in the first few inches of any water that comes in.
• The bottom seal. The rubber strip along the bottom edge sits in whatever pools at the threshold. Salt left in it dries into a crust that stiffens the rubber and wears it faster.
• The bottom brackets and cable ends. The lift cables attach at the lower corners of the door, under heavy spring tension. Salt and standing water there start rust where it's hard to see.
• The base of the tracks. The vertical tracks end close to the floor, and their lowest bolts sit in the same splash zone.

How the sensors work is covered in how garage door sensors work, and the seal has its own bottom seal guide. The question here is what salt water does to them.

Garage door sensors wet after flooding: what to check

Can garage door sensors get wet? They are made for a garage, which means dust, humidity and the odd splash, but they aren't meant to sit in water. If water reached them, work through these steps once the floor is dry:

1. Leave anything electrical alone while the floor is wet. Don't touch the opener's plug, an outlet or any wiring while standing in water. If an outlet or the opener got wet, have a licensed electrician check it before it's used again.
2. Rinse, then dry. Wipe salt off the sensor housings and brackets with a cloth dampened in fresh water, then dry them. A salty film left to dry turns into a haze.
3. Clean the lenses. Wipe each lens gently with a soft, dry cloth. Dried salt and smears can weaken the beam.
4. Look at the wire connections. Thin low-voltage wires connect each sensor to the opener. Green or white crust on the terminals, or a wire that has worked loose, is a common reason a sensor that worked before the water doesn't work now.
5. Check the indicator lights. Most sensor pairs have a small light on each side. One that is off or blinking can mean the pair is out of line or the wiring is damaged.
6. Test the reversal. Run the photo-eye check in the auto-reverse test guide. The door has to reverse when the beam is blocked.

If the door refuses to close, or reverses for no clear reason, the sensors are doing their job by stopping it. Don't tape them, point them somewhere else or bypass them to get the door shut. A door that can't see what's under it can injure someone.

Before the tide and after: a two-part routine

A day or two before

• Check the tide predictions so you know which days to watch.
• Move cardboard boxes, paint cans and anything that floats or stains off the garage floor.
• Lift cords and power strips off the floor, and keep the area around the sensors clear.
• Close the door fully before the water comes and leave it shut until the driveway drains, so the opener isn't running while water sits at the threshold.
• Take a quick photo of the sensor lights while everything works, so you know what normal looks like afterward.
• If your street is one that floods, have flood panels or sandbags ready, as the city suggests for low-lying areas.

Once the water goes down

• Rinse the bottom edge of the door, the seal and the lower tracks with fresh water, starting at the top and working down.
• Dry the bottom brackets and look at the cable ends for rust or broken strands. Look only. They are under tension.
• Clean the sensors and run the checks in the section above.
• Open and close the door once while you watch for a crooked bottom edge or a jerky run.

Salt keeps working on steel long after the water is gone. The salt air protection guide covers rinsing and lubrication for the rest of the year.

When it's more than a wipe-down

Some problems don't clear up with fresh water and a cloth. It's time to call if:

• A sensor light stays off even though the wiring looks fine, or a lens is cracked or cloudy on the inside.
• The sensor brackets have rusted or bent so the two eyes won't stay aimed at each other.
• The door reverses at random, or only closes while you hold the wall button down.
• A cable shows rust or broken strands at the bottom bracket.
• The bottom of the door no longer sits level on the floor.

Sensor faults are covered on the garage door sensor repair page, and a damaged cable is a cable repair. Momentum answers the phone at (954) 636-6320 at any hour, every day of the week.