Topic: Natural Hazards
Teacher: Mr Ragbirsingh
Definition of Hazards and Disasters
A hazard is any source of potential damage, harm or adverse health effects on something or someone under certain conditions at work.
Basically, a hazard can cause harm or adverse effects (to individuals as health effects or to organizations as property or equipment losses).
Sometimes a hazard is referred to as being the actual harm or the health effect it caused rather than the hazard. For example, the disease tuberculosis (TB) might be called a hazard by some but in general the TB-causing bacteria would be considered the "hazard" or "hazardous biological agent".
Hazards are sometimes classified into three modes
* Dormant - The situation has the potential to be hazardous, but no people, property, or environment is currently affected by this. For instance, a hillside may be unstable, with the potential for a landslide, but there is nothing below or on the hillside that could be affected.
* Armed - People, property, or environment are in potential harm's way.
* Active - A harmful incident involving the hazard has actually occurred. Often this is referred to not as an "active hazard" but as an accident, emergency, incident, or disaster.
Types of Hazard
Hazards are generally of four types, physical hazards, chemical hazards, biological hazards and allergenic hazard.
A disaster is a natural or man-made (or technological) hazard resulting in an event of substantial extent causing significant physical damage or destruction, loss of life, or drastic change to the environment. A disaster can be extensively defined as any tragic event stemming from events such as earthquakes, floods, catastrophic accidents, fires, or explosions. It is a phenomenon that can cause damage to life and property and destroy the economic, social and cultural life of people.
In contemporary... [continues]
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