Final Conflict, The (Omen #3) by Gordon McGill - Vintage Paperback

Around the globe, drought, famine and flood are striking down helpless millions. And everywhere there is trouble. Damien Thorn's followers can be found--almost before disaster strikes -- ready to offer aid to the pitiful survivors. Damien, the handsome, thirty-two year old head of one of the world's most powerful corporations... and certain to be president of the United States by the time he is forty. Damien, believed to be the son of Satan, who is relentlessly reaching out to claim the Earth for the forces of darkness... Now is the time of prophecy, the beginnings of the end for mankind. But where is the promised Messiah, to save the world from ultimate evil?