Ed a perspective, In the September attacks I would say the Number affected is a lot more than the 7,000 dead.

there were propably 30,000 injured, 100,000 airline jobs, the people who lost money in the worldwide stock market. the present refugees in Afghanistan. Travel industry, Air port security. Psychological damage. Bigoted attacks on Moslems, lost work....I'd say the number Affected by this one attack could conservatively estimated at One Billion.

But preventing and giving shelter during floods and feeding the hungry are still important.

From the report...

Floods accounted for over two-thirds of the annual average of 211 million people affected by natural disasters, while famine affected nearly one-fifth. Yet floods proved less deadly, accounting for 15 per cent of deaths from natural disasters, compared to famine's 42 per cent.