First off, the Taliban and Al Queda are completely different entities, even if the former did harbour the latter during their rule of Afghanistan.

Pakistan's ambassador to the US, who said repeatedly that the area hit by the flooding was the main Taliban stronghold in the country

Part of it may be, but an estimated 20,000,000 people have been left homeless by these floods. That's a lot of innocent people at risk from exposure, dehydration and disease, especially cholera.