Despite its relatively temperate climate and stable geography, natural hazards present multiple risks to human activity in the UK. These range from small-scale local occurrences, such as landslides, through regional incidents, such as flooding, to major high impact, low probability events, such as space weather. The impacts of such hazards can be wide-ranging but may include disruption to critical infrastructure and transport networks, detrimental effects on human welfare, and, in some cases, loss of life. This POSTbrief summarises the emergency planning for such hazards undertaken by Civil Contingencies Secretariat (CCS) of the Cabinet Office and published in the classified National Risk Assessment (NRA) and unclassified National Risk Register (NRR).