Directly after a disaster, it’s difficult for local authorities to clearly and cohesively communicate what items are needed. That’s why financial gifts are so important. With monetary donations, professional relief organizations can streamline emergency shelter, food, medical care, volunteers, post-disaster counseling services, and other supplies such as blankets. Financial contributions also support mobilization, training, and compensation for workers. The challenge for many disaster responders is that some relief appeals are more successful than others. In particular, disasters perceived to be caused mainly by natural factors, such as a tsunami or earthquake, tend to be more popularly supported than those caused by human factors, such as war or corruption. Nevertheless, the cause of a disaster -- natural or manmade – is often blurred and can contribute to donor apprehensiveness.