Most of them come from natural disasters such as floods, weather condition, earthquake. A fierce storm. Hot weather are unusual people died, including an epidemic of new type.
Most come from natural disasters such as floods, earthquakes, storms, weather conditions are severe. Unusual heat until someone died. Including new types of epidemics.
Mainly due to natural disasters, such as weather conditions, flood, earthquake, storm, severe air hot unusual until someone died. The new type of plague