The actual Harbingers are God warning US. He would not be warning US still if there was no hope of turning about and following Him. The handwriting on the wall is the final judgement proclaimed (Chapter five in Daniel). The Harbingers are given so that We The People may turnabout and not fall under the final judgement.
The warnings are past though...it is probably too late for the US and the world, this is not going to be limited to the US. It is going to be a time of great pain, but also great love for our Lord Jesus Christ and those who embrace and accept our Lord will have solace during the strife.
Our arrogance in believing we are sufficient without God is also our downfall, we ALL have become guilty of that. We don’t need God because we provide for ourselves we believe...God is going to show us the emptiness of that belief.