At its worst, the pressure drop corresponded to a leak five times the normal rate, but by late last week it was only twice the normal rate.

MSN: Crew finds ��culprit�� in space station leak

Storm surges have the potential to be dangerous because they involve a great upwelling of a stretch of ocean - intense low pressure at the heart of a storm literally tugs the sea surface above its normal level to create a massive bulge.

BBC: Legacy of Britain's great flood