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Quiz yourself on Weather HazardsGet your flashcardsBuild my revision planTrack my progress🌩️ What Are Weather Hazards?
Figure 1: Structure of a Tropical Storm — the eye, eyewall, and spiralling rain bands
A weather hazard is any atmospheric event that poses a serious risk to people, property, or the environment. Unlike tectonic hazards — which are driven by forces deep inside the Earth — weather hazards are driven by energy in the atmosphere, primarily the uneven heating of the Earth's surface by the Sun.
Weather hazards come in many forms. The main types you need to understand for your GCSE are:
- Tropical storms (called hurricanes in the Atlantic, typhoons in the Pacific, and cyclones in the Indian Ocean) — intense low-pressure systems that form over warm tropical seas and produce extreme wind, heavy rainfall, and deadly storm surges
- Flooding — when rivers, coasts, or drains overflow their normal channels, inundating land; can result from prolonged rain, intense rainfall, storm surges, or a combination of these
- Drought — an extended period of abnormally low rainfall that depletes water supplies, damages agriculture, and can trigger wildfires
- Extreme cold and heat — temperatures far outside the normal range, threatening human health and infrastructure (the 2003 European heatwave killed around 70,000 people)
- Tornadoes — violent rotating columns of air extending from a thunderstorm; more localised than tropical storms but extremely destructive in their direct path
A crucial point: a weather event only becomes a disaster when it intersects with human vulnerability. A Category 5 typhoon crossing open ocean causes no deaths. The same storm making landfall over a densely populated, low-lying coast with poor-quality housing can kill thousands. The severity of impact is always a function of both physical hazard intensity AND human vulnerability — the choices societies have made about where and how to build, and how much to invest in preparedness.
For your examination, the two main areas of focus are tropical storms — their global distribution, formation process, and impacts — and UK extreme weather events, using the Somerset Levels flooding of 2013–14 as a specific case study. All major exam boards (AQA, Edexcel and OCR B) require you to apply evidence to support explanations, so learning the statistics in this topic is not optional.
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