People all over the nation, even the world, responded with donations of clothing, food, and shelter. Doctors, nurses and Clara Barton and the American Red Cross arrived to provide medical assistance and emergency shelter and supplies. The Johnstown Flood was the first major disaster served by the recently formed Red Cross. Doctors worried especially about diseases that might breed in the unclean water and decaying bodies of humans and animals.
Undertakers volunteered for the gruesome task of preparing over 2,000 bodies for burial. 700 of the victims could not be identified. They were buried together in a new cemetery built high above the town. Recovering the bodies took weeks and cleaning up debris took months. Five thousand homes had been destroyed, so many families lived in tents. During recovery and relief efforts the state of Pennsylvania put Johnstown under martial (military) law, since many of the towns leaders had perished in the flood. General Hastings took charge for several months, making sure relief supplies went to survivors who needed them and keeping the press from taking over the town.
Intercontinental ballistic missile (ICBM) is a ballistic missile with a minimum range of more than 3400 miles that are essentially designed to deliver nuclear weapons over long distances spanning to other continents. They can travel a substantial distance before hitting their target
The answer for this would be the individuals on the island would all appear very alike to individually or each other, and they may demonstrate uncharacteristically high incidences or manifestation of traits that are unusual in the universal human population.