Or they could of prepared correctly years ago when the local communities asked for help. Proper flood barriers, advance preparation for the events that have unfolded. I guess you're not up to your arse in flood water so it's easy to be flippant
It's not quite as simple as you make it sound though is it?
They can't exactly stick up barriers along the entire length of every river in the country can they? They do their best to protect the larger concentrations of the population with these barriers, even somewhere the size of Bewdley has a proper flood defence system through the middle of town and that's currently being worked to a point where they've had to close the bridge over the Severn but the barrier is still doing it's job. All you're doing there though is pushing the problem somewhere else along the river, if the water can't spill over the top in Bewdley it'll either carry on downstream to burst banks elsewhere or get backed up before them and flood somewhere else.
Flood prevention is a complex art.
Of course the whole thing isn't helped either when you've got fairly substantial settlements built on flood plains, flood plains which grow as settlements right on the rivers get these flood barriers to protect them and force more water elsewhere. It's bad what's happening to these people but surely if they put a bit of thought into where they're deciding to live they could make a fairly safe assumption that floodplains/near to a river is going to increase the chances of flooding, it's natural, it can't always be controlled.
Most of these flood prevention measures are designed to cope with a 1 in 100 year storm, big problem being that we're getting that sort of storm at the moment, so no surprise that they're struggling when they're pushed to breaking point, it's not like they're failing under average rainfall conditions.
None of this really makes much difference now anyway, it's all preventative measures, that stage has gone, until the next storm comes around, what they need now is to recover and that isn't any easier, how do you suddenly get rid of such a massive volume of excess water? A problem which is only compounded by the duration of this weather, even places which aren't flooding are completely sodden so there's nowhere to push this excess water, the water table can only rise so far and then you get no further infiltration into the ground.
You're never going to be able to fully control nature.