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Weather Hazards and Climate Change

The impacts of drought and responses to it

  • 3 things to know
  • Paper 1

Overview

Why drought is a hazard, its effects on food, health, ecosystems and soil, why it costs more money in developed and more lives in developing countries, and how individuals, aid organisations and governments respond.

What you need to know

Answer each one before you reveal it.

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Key term

Why does drought put the food supply at risk?

Key term

How does a drought endanger people's health?

Key term

How does a long drought damage ecosystems?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    Why is drought treated as a hazard rather than simply dry weather?

    Model answer

    Because the water shortage threatens people's lives, health, food supply and livelihoods.

  2. 2

    Why does drought put the food supply at risk?

    Model answer

    Crops wither without water and livestock have no pasture, so harvests fail, animals die and what food remains becomes scarce and expensive.

  3. 3

    How does a drought endanger people's health?

    Model answer

    Clean drinking water becomes scarce so people use dirty sources and disease spreads, and malnutrition follows the failed harvests.

  4. 4

    Why is drought described as a creeping or slow-onset hazard?

    Model answer

    It builds up over months rather than striking within hours, so its beginning is hard to pin down and it is often recognised only once damage is done.

  5. 5

    How does a long drought damage ecosystems?

    Model answer

    Rivers, wetlands and water holes dry up, plants die back, and animals starve or migrate away, so food chains break down.

  6. 6

    What happens to soil during a prolonged drought?

    Model answer

    It dries, cracks and loses its structure, and with no plant cover it is blown away by wind or washed off when rain returns, which can lead to desertification.

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Changing Cities
Coastal Landscapes and Processes
Ecosystems, Biodiversity and Management
Energy Resource Management

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ALess reliable rainfall slows both growth and decay.
BNutrients sit unused in litter.
CViolent storms wash more of them away in run-off.

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