According to the United States Department of Defense the death toll was 116,516.

The total death toll for the United Kingdom in WW2 was 450,400

According to the United States Department of Defense the death toll was 116,516.

There is no way of knowing, because the death toll would depend upon where the waves struck. The death toll in a developing nation would be significantly higher than if it hit, say, the United States.

There is not a specific " Class A" naltural disaster. Natural Disasters are classified by death toll, property damages, etc.