Bridges and underpasses etc

[Steve]

As a side note to this if you are ever caught by flooding due to a blocked drain, be very wary if you decide to attempt to clear the drain, in the floods in Hull and Grimsby a couple of years back a chap died after attempting to clear a blocked drain and got sucked down and trapped by the weight of water.

Very good point T, well posted.

A drain can be blocked by something as simple as a shopping bag, but once the water starts moving again it has a lot of power.