Socratic discussion:

  • Define Risk
  • What is the difference between risk and vulnerability?
  • What variables are used to measure the Saffir Simpson Scale?
  • How do they predict hurricanes? How accurate are they?
  • What are the main threats of a hurricane? Name 3
  • How can we predict hurricanes?
  • What factors make a population more vulnerable to hurricanes?

Discuss these issues with Katrina as a Case study Risk Assessment Process


  • Examine the relationships between the degree of risk posed by a hazard and the probability of a hazard event occurring, the predicted losses and a community’s preparedness for it.
  • Explain the reasons why individuals and communities often underestimate the probability of hazard events occurring.
  • Discuss the factors that determine an individual’s perception of the risk posed by hazards.

Exercise 1: 

In your CS Hurricane CS notes, find the following values of a hurricane

  1. —Frequency
  2. —Duration
  3. —Areal Extent
  4. —Speed of onset
  5. —Spatial dispersion
  6. —Regularity

Exercise 2:

Image below: These are images showing sea surface temperature (left) and sea surface heights (right) from Augut 24th to the 29th. The dots indicate the location and intensity of Hurricane Katrina (circle data from the National Hurricane Center). Image credit: NOAA








  1. Describe Katrina’s intensity and direction [3 + 3]
  2.  Explain the relationship between intensity and sea surface temperature [4]

Exercise 3: Risk: Exposure of people to a hazardous event

Based on your Bishop reading p. 13,14. Complete the following questions:

  1. Define Risk [2]
  2. Basing your observation on the Park model, evaluate the risk to hurricanes of the people of New Orleans in August 2005. [10]