Sources
EM-DAT: The OFDA/CRED International Disaster Database (www.emdat.be); Université catholique de Louvain, Brussels, Belgium.
Definitions & Technical notes:
Hydrological disasters are defined as events caused by deviations in the normal water cycle and/or overflow of bodies of water caused by wind set-up. Such events are further classified as: Flood (river flood, flash flood, storm surge/coastal flood), and Wet Mass Movement (rock fall).
Only disasters that fulfil at least one of the below criteria are included in EM-DAT:
- 10 or more people reported killed
- 100 or more people reported affected
- Declaration of a state of emergency
- Call for international assistance
Fatalities are the number of persons confirmed as dead and persons missing and presumed dead (official figures when available).
Persons affected are the number of persons who required immediate assistance during a period of the emergency, including injured persons and persons displaced or evacuated.
A “0” in EM-DAT does not represent a value and can mean either there were no reported events or no information is available.
Data Quality:
The EM-DAT database is compiled from various sources, including UN agencies, non-governmental organizations, insurance companies, research institutes and press agencies. Priority is given to data from UN agencies, governments and the International Federation of Red Cross and Red Crescent Societies. The entries are constantly reviewed for redundancy, inconsistencies and incompleteness. CRED consolidates and updates data on a daily basis. A further check is made at monthly intervals. Revisions are made annually at the end of each calendar year.
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