Google have just withdrawn the old version of their "Maps API". That broke Flood Maps and sent me into a tizzy of reading up on the new version and recoding my JavaScript to use it.
The site was down for a few hours, but I've now restored it. The positive side-effect is that it now benefits from all of the improvements made to Google maps over the last year. The most obvious upgrade is that there are maps of the whole world, rather than just the USA, UK and Japan.
That makes the potential threat to the Netherlands (for example) all the more striking.
Thanks to Mike Pouy, who spotted the problem.