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Hazard versus risk
Short answer
Hazard is a potential damaging event; risk is expected loss = hazard × vulnerability × exposure. Hazard cannot be stopped, but risk can be reduced by lowering vulnerability and exposure. An earthquake in an uninhabited desert is a high hazard but low risk.
Differentiate between hazard and risk.
A hazard is a natural or man-made event, process or condition with the potential to cause loss of life, property or environmental damage. Risk is the expected loss (probability of harm) from a hazard to the elements exposed, taking account of their vulnerability.
| Point | Hazard | Risk |
|---|---|---|
| Meaning | Source of possible harm | Probability and amount of expected loss |
| Nature | Physical event (landslide, flood) | Combined effect of event and what is exposed |
| Depends on | Magnitude, frequency, location | Hazard, vulnerability, exposure, capacity |
| Can be reduced | Seldom (cannot stop earthquake) | Yes, by lowering vulnerability and exposure |
| Uninhabited area | Hazard may exist | Risk is nil or low |
| Example | A landslide-prone slope | Expected damage to a village below the slope |
| Measure | Probability, intensity | Expected loss (lives, money) |
Example: an earthquake in a desert is a hazard but has little risk; the same earthquake in Kathmandu is a high risk.
✓ Answer checked by Claude Opus 5.5 (high effort)
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