
By October, the afternoons stop asking permission. The sky turns the colour of wet pavement at about four, the first fat drops land on the ledge, and twenty minutes later it is finished — sun back out, void deck steaming, the whole episode quietly filed under weather.
Your flat files it differently. Outside, the rain has stopped. Inside, it is still working: on the floor by the balcony door, in the hem of the curtain, along the seam where the window frame meets the wall. The storm is a twenty-minute event. What it leaves behind runs on a much slower clock.
Water on tile is not, by itself, a crisis. Tile has seen worse. The trouble is everything the rain brings with it — fine grit off the common corridor, soot and dust shaken out of the air, pollen and leaf litter blown in across the balcony, and then whatever is on the soles of everyone who comes home wet.
That slurry spreads into a thin film while the floor is damp and settles as the water evaporates. By evening you have a dull grey bloom nobody can quite point at, and in the grout lines a darker version of the same thing that a mop only moves around. A round of floor deep cleaning is what lifts grit out of grout; a mop mostly carries it to the next tile.
None of that takes long. It does, however, have to happen while the floor is still damp. Once the film dries, you are into a scrub rather than a wipe.

Laminate and engineered timber are sealed on the face and bare on the cut edge. Water sitting on the surface for an hour does very little. Water that finds the join between two planks, or the gap under a skirting board, goes somewhere it cannot easily leave.
The tell arrives days later: a plank edge standing a shade proud of its neighbour, a faint ripple when the light comes in low, a skirting board that has lost its crisp line. Blot rather than mop — a dry towel pressed hard along the join pulls out more water than any amount of wiping — and leave a fan playing across the floor afterwards. Moving air is doing more work here than any product will.
Curtains are the most patient things in the flat. A hem that has sat in a shallow puddle will wick water well above the waterline, and sheer fabric dries slowly in air already holding about as much moisture as it can.
Sofas parked against the glass get the same treatment along one arm, and so does a mattress pushed up under a bedroom window. Nothing looks wrong. Then, around day three, the room smells faintly of a damp cupboard. That smell is not in the air — it is in the pile, which is why airing the room never quite reaches it. Steam-based sofa and mattress cleaning is built for exactly that: lifting the moisture, and what has taken hold in it, back out of the fabric.

The window reveal is where a storm does its lasting harm. Water pools on the flat ledge inside the frame, works into the hairline between frame and plaster, and sits in the silicone seam where the two meet. All three are places that stay wet long after the floor has dried.
First the paint loses its sheen. Then a chalky patch appears. Then, two or three storms later, a scatter of black specks along the seam. Caught in the first week, that is a cloth and ten minutes of your evening. Left to settle in, it becomes mould removal, because by then it is behind the paint rather than on it.
So the job was never the storm. It is the hour after it. Dry the sills tonight, check the hem of the curtain, put a fan on the floor by the balcony door — and if a few months of afternoons have already left their mark, a round of housekeeping will get you back to a sensible starting line before the wetter months properly arrive. When you are ready, you can book your next clean in a couple of minutes.