What has happened to Dr. Sasaki and Dr. Fujii?

Dr. Fujii was trapped under the refuse of the hospital and had to force his way out before the tide came in and drown him.

Dr. Fujii was so stupefied and so tightly squeezed by the beams gripping his chest that he was unable to move at first, and he hung there about twenty minutes in the darkened morning. Then a thought which came to him—that soon the tide would be running in through the estuaries and his head would be submerged—inspired him to fearful activity; he wriggled and turned and exerted what strength he could (though his left arm, because of the pain in his shoulder, was useless), and before long he had freed himself from the vise.

Dr. Sasaki got on a train and headed for Hiroshima.

ON THE TRAIN on the way into Hiroshima from the country, where he lived with his mother, Dr. Terufumi Sasaki, the Red Cross Hospital surgeon, thought over an unpleasant nightmare he had had the night before.