Horam's flood risk comes down the hill, not up from a river. Almost none of the area sits in a river or sea flood zone. The coast is miles away. About one postcode in eleven still rates high on at least one flood measure. The risk is local, and it's the rain.
On the Environment Agency's river-and-sea mapping, the Horam area has almost nothing in the flood zones. About 0% of postcodes fall in Flood Zone 2, the medium-probability band, and under 1% fall in Flood Zone 3, the high-probability band. The two zones are separate bands. Zone 2 is the fringe beyond Zone 3, not a bigger area containing it, so a zero there is no contradiction. For rivers and the sea, the answer for most of the village is no.
Surface water is a different measure and a different story. The area sits on the slopes of the Weald, cut by headwater streams of the River Cuckmere, with the Waldron Ghyll as the main valley. Water that falls on a hillside has to go somewhere, and a house at the bottom of a lane, or in the dip of a valley, is where it ends up. A river map won't show that. The postcode figures further down include it.
Looking ahead, the Environment Agency's climate-adjusted flood zone covers under 1% of postcodes, the same as today. On rivers and the sea, the forward view barely moves.
For insurance, most homes here should look ordinary to an underwriter on river and sea risk. The exception is a property on a surface-water route or in a stream valley. There, the quote can come back higher or with conditions, and it's far better to find that out before exchange than after. Get a quote on the exact address before you instruct a solicitor, not after.
Now the postcode picture, which is where the headline gets more honest. Across the area, about 9% of postcodes rate high on at least one flood measure, about 6% rate medium and about 16% rate low. "At least one measure" includes surface water alongside rivers and sea, so these shares overlap with the flood-zone figures above rather than adding to them. That's why the zones look clean and this doesn't. The rain was never on the river map.
Counting homes rather than postcodes makes the risk more concrete. The Environment Agency's rivers-and-sea mapping lists only the 13 postcodes carrying some risk, holding 270 properties in total. Of those, 19 properties are at high risk, 7 at medium and 13 at low, and 6 of the high-risk properties are homes. Every other postcode doesn't appear on that list at all.
On defences, the model finds under 1% of postcodes in the high-risk extent without a defence, and 0% with one. In plain terms, no modelled defence stands between that small high-risk slice and the water. Even where a defence does show up in a model elsewhere, it means a defence is present, not that the house behind it stays dry.
The sea is a long way off, with the typical postcode about 9.5 kilometres from the coast and the nearest about 7.8 kilometres. About 5% of postcodes fall under a shoreline management plan at all. For those, the stated policy is to hold the line over the next 20, 50 and 100 years. That's an intention to keep maintaining defences on that stretch of coast, not a guarantee, and not a new wall already built.
The nearest tide gauge, at Dover, recorded sea level rising by about 2 millimetres a year between 1961 and 2010. That's a measured historic rate, not a forecast, and at this distance from the water it's context rather than a threat to the village.
No historic flooding is recorded in the area. That's reassuring, since the Environment Agency's record would usually show a known event. It isn't proof that no garden or kitchen has ever taken water, and it says nothing about next winter's rain.
Flood risk in Horam is middling. The rivers and the sea mostly leave it alone, but surface water on the hillsides doesn't, so check the lane as well as the postcode.