What causes a tsunami?
Generally a tsunsami is caused by an earthquake. The sudden motion of the qround causes the tsunami. Tsunamis travel extremely rapidly which doesnt allow areas to prepare for them.
http://geology.com/articles/tsunami-geology.shtml
How is the country dealing with the devestation? What countries worldwide are helping with the effort?
The country is making makeshift camps to shelter them. They are also distributing food to all the people in need. Also the country is accepting aid from other nations.
http://english.aljazeera.net/news/asia-pacific/2010/10/201010292401339180.html
As a christian, what would be your response to the question: "If there is a God, how can he allow these things to happen? I thought he was all loving?"
God allows things to happen. God can shine through any situation. He can use a bad situation to show his mercy and glory.