Sea level is already rising enough to trouble some of the flatter Pacific nations.
Our cherry crop was cruddy this year, most of the eating peaches didn't survive the spring storms in the middle of blossoming. Fortunately the peaches I use for cooking, drying and liqueurs flowered later and have a decent crop. Bumper crops of quinces (I grow Smyrna, Japanese and Chinese), likewise rosehips, this year. Reasonable crop of apples, though many in the district have been less lucky, maybe because my apple trees are older hardy varieties such as Cox's Orange Pippin, Belle de Boskoop, Court Plat Pendu, Golden Harvey and Geeveston Fanny - cider and cooking apples with a few oldstyle tart eating apples. Modern apples seem to be more fragile.
The pears didn't crop at all, nor the nut trees. Of the plums, only Greengage, D'Agen and the Damson did much at all. All the blackcurrant bushes and a couple of cherry trees died. Lots of berries survived though. We seem to have far fewer honeybees about than usual. Less of a problem for me because I provide habitat for the native bees and they do some of the pollination, rough on the local orchardists. The weird season has been hardest on the growers of winegrapes. Vintage is running more than a month late in our area, which mucks up the harvesting and pressing schedule and a lot of the processing downstream from there.
I think we'll have a food crisis long before we have to worry about flooding.