LONDON — The Burmese regime is not to blame for the powerful cyclone that struck the Irrawaddy Delta and Yangon early this month, killing up to a hundred thousand people. But it certainly will be to blame for the next wave of deaths if aid does not soon reach the survivors.

A hundred years ago, the victims of such a catastrophe were on their own, but there are now well-established routines for getting help in quickly from outside. We saw them at work in the same region during the tsunami that killed at least twice as many people in 2004. Nothing could be done for those who died in the first fury of the event, but relatively few died from disease, injuries, exposure or sheer hunger or thirst in the days and weeks that followed.

Indonesia, Thailand, Sri Lanka and India — the nations worst hit by the 2004 tsunami — are reasonably well-run countries that were able to help their own citizens, and they had no hesitation in welcoming international aid as well. Burma (which got off lightly in 2004) is very different. The question is: why?