News reports before the typhoon hit said 4000 people had been evacuated. Why only 4000? Lack of resources?

Now that the typhoon has devastated the philippines, the international community is sending aid, money, resources. Why can't the same be done before a disaster like this hits? I'm sure the millions pouring in now could have gone a long way to evacuate people or set up shelters, dams, pumps, before it killed 10,000+

And for the financially minded bureaucrat, I'd guess preventive measures would possibly cost less as well.