• Large scale damage to the infrastructure causes buildings to fall down which causes huge deaths and injuries.
• Small houses may be swept away.
• The total transportation system may collapse. Sometimes, it takes several days for relief teams to arrive.
• With collapse of utility carriers, there is no provision – no electricity, no water, no food.
• Hygiene issues cause health hazards.
• With damage everywhere and, too many people sick and injured causes medical facilities fall in major short-supply.
• As the communications infrastructure fails, no way to communicate with the outside world.
• Lack of food, shelter, medical aid and communication method.
• All these situations could last for several days.

Figure: Post disaster aftermath
[Photo Credit: http://www.defense.gov/home/features/2010/0110_haiti/photoessays.html]