Short bouts of diarrhea and upset stomach and colds or other breathing diseases sometimes occur in developed countries, such as the United States, after a natural disaster, particularly among large groups of people in a shelter. Basic hygiene measures like frequent hand washing or use of an alcohol hand gel, especially after using the restroom or changing diapers and before eating, can help prevent these diseases.
Diseases like cholera or typhoid are rare in developed countries and do not typically occur after a natural disaster.
For information on infectious disease, see Infectious Disease After a Disaster.