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The first 72 hours of water damage in a Hollywood home

Water damage runs on a clock, and the first 72 hours decide the size of the job. In hour one, water is spreading quietly under baseboards and grout lines. By the end of day one, drywall has wicked it upward and wood has started to swell. By day three, in a warm South Florida house, mold is often visible and materials that could have been dried now have to be cut out. This page walks through those stages so you know what you are looking at — and what to do at each one. If you are in hour one right now, skip to the checklist: stop the water, make it safe, photograph everything, call for help.

Hour 1: spread you mostly cannot see

The first hour is about movement. Water leaving a burst supply line, a split washing-machine hose or an overflowing AC drain pan does not stay in a puddle. It runs under baseboards, into the grout lines of tile floors, under cabinet toe-kicks, and along the slab to the lowest point in the room — which is rarely where the leak is. A ceiling taking on water from above can start to sag, and the stain from wet wood furniture legs can transfer onto tile. Wood and laminate begin taking on water at the edges, though nothing looks different yet.

What to do in hour one:

1. Stop the water. Close the main valve. Our shut-off guide shows where it usually is on a Hollywood house and in a condo.
2. Make it safe. Switch off breakers to wet rooms only if you can reach the panel without standing in water. Keep people and pets out of any room where water has reached outlets or appliances.
3. Lift what you can. Move rugs, electronics, papers and small furniture up off the floor. Do not start tearing anything out.
4. Photograph everything. Wide shots and close shots, before any cleanup. Those photos, with the time on them, are the start of your insurance file.
5. Call. (954) 872-0362 is answered around the clock; a technician can talk you through the valve while a crew is on the way.

Hours 1 to 24: wicking, swelling, smell

Through the first day, drywall does the damage for the water. Gypsum wicks moisture upward from the floor line, several inches above the visible water, and the baseboards hold that water against the wall the whole time. Laminate and wood floors start to swell at the seams. Carpet pad, if it is still down, holds water against the slab and keeps the room wet from below. A musty smell builds in closed rooms — that smell is microbial growth getting started, not just damp.

This is the window where professional extraction changes the outcome. Water pulled out on day one leaves drywall that can be dried in place and floors that can be saved. The extraction page in this hub explains how standing water comes out, floor by floor, including when carpet can be dried and when its pad has to go. Keep the AC running at a normal setting during this stage unless the air handler got wet or the water is sewage — normal AC pulls humidity out of the air. Do not crank it to an extreme low setting; that does not dry a house faster and cold vents can sweat in humid rooms.

Hours 24 to 48: the mold window

The second day is the deadline the professionals work against. The EPA's guidance for homeowners says wet materials should be dried within 24 to 48 hours to prevent mold growth (EPA, Brief Guide to Mold, Moisture and Your Home). South Florida does not give you the cool, dry margin that guidance assumes elsewhere: even in January, the coolest month at the Fort Lauderdale–Hollywood airport, average temperatures sit in the high 60s (climate normals published by NOAA), and warm rooms favor fast growth.

Two quiet changes happen in this window. Clean water that sat in warm conditions starts degrading toward Category 2 in IICRC S500 terms — the contamination rating rises with time and heat — and wood floors begin to cup, paint begins to blister, and metal fasteners and tack strips start to rust. Materials are still mostly salvageable on day two, but the margin is closing, and the drying equipment needs to be running, not scheduled.

After 72 hours: a different job

By day three, expect visible mold on damp drywall and inside wall cavities, swollen cabinet bases, delaminated carpet backing, and drywall that has to be cut out — usually with a straight flood cut above the highest wet reading — instead of dried. The IICRC S500 standard treats water that has sat and degraded more harshly, and porous materials touched by Category 3 water come out entirely. What was a three-to-five-day drying job on day one can become a removal, remediation and rebuild job on day four. Typical timelines once drying does start are on our drying times page.

There is a second cost to waiting, and it is on paper. Homeowners policies expect reasonable steps to protect the property after a loss. Dated photos, a recorded call, and a documented mitigation start time show that you acted — an insurer can question damage that grew because nobody called. The full process, from that first call through extraction, structural drying and rebuild, is laid out in the restoration guide, and storm or flood water carries its own coverage rules through the National Flood Insurance Program (fema.gov/flood-insurance). What to do with those first photos once the immediate emergency is handled — how they become the backbone of the claim file — is covered in the guide to documenting water damage for an insurance claim.