Mr Willetts is not the only writer to worry about baby-boomers crashing through society like a flash flood.

ECONOMIST: Social change

Many of the suburban Philadelphia areas were hit by Hurricane Floyd in 1999 and by a flash flood last summer, said Marko Bourne, spokesman for the Pennsylvania Emergency Management Agency.

CNN: At least 4 perish in fire in flooded Philadelphia

The National Weather Service issued a flash flood watch through Monday morning for parts of southwest Alabama, northwest Florida and southeast Mississippi, where three to six more inches of rain are expected.

CNN: STORY HIGHLIGHTS

Although it was still raining, the weather service lifted a flash-flood watch for Pennsylvania counties Sunday morning.

CNN: At least 4 perish in fire in flooded Philadelphia

We help BNSF Railway prevent accidents by precisely informing them in sufficient time to take precautionary measures where a tornado or flash flood will occur along their right-of-way.

FORBES: Fact and Comment

The Environment Agency has staged a flash mob in Bristol in an attempt to get more people to sign up to its flood warning service.

BBC: Bristol flash mob aims to increase flood alert users