It will come like a thief that destroy things, and the nonbelievers of this materialistic world will lose everything they hold dear. It's a horrible feeling to walk in and find your home ransacked and many of your possessions stolen. You don't expect to come home and find your things stolen, but when the nonbelievers least expect it, sudden destruction will fall on them without warning and out of nowhere, just like that. This will happen when people are feeling safe and secure and are repeating the slogan, Peace and safety. This false peace will give them a sense of inward tranquillity, possibly gained by trusting in the Satanic religions that will flourish.
Safety refers to the apparent stability of social, economic, and political conditions.
Those, along with peace, will exist in the first part of the Tribulation. Sin will be deified and glorified, and the man of lawlessness will be substituted for the Prince of peace, and there will be no real peace. The sudden destruction that will come is not annihilation, it's the loss of all that makes life worthwhile. There isn't any possibility of escaping it. It will be like a woman in childbirth where the pain is inevitable.