disaster
(noun) 1 : a sudden calamitous event bringing great damage, loss, or destruction; broadly : a sudden or great misfortune or failure; 2 obsolete : an unfavorable aspect of a planet or star

To that add natural.

I wonder if all the people that want to place blame have taken the time to think about the total area that was destroyed. The amount of people that have been affected. All the cities and towns. Use Google Earth to fly the whole area. Do you really think that anyone has the resources or manpower to fix it overnight? Do you really think a few thousand more N. Guards were going to make the difference? I guess it's just easier to stomp your feet and yell I want it now,now,now. Instead you should look at how much has been done in a week. I think it's incredible.

In this disaster a week is like overnight.