Global Flood Maps

Our global flood maps provide flood extents and depths for multiple return periods across a range of flood sources.

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HIGH QUALITY FLOOD MAPS

Our global flood maps provide flood extents and depths for multiple return periods, covering both river and surface water flooding, as well as coastal flooding in some countries. This allows for a consistent and comprehensive view of global flood hazard.

We constantly strive to improve our maps through new data, research and innovation. We go to great lengths to ensure we are using the highest quality elevation data, which is a key input to any flood map. We offer 30m global flood maps for every country in the world, as well as 5m flood maps for the UK, US and Continental Europe, providing a more granular view of the risk in urban areas and areas prone to surface water (pluvial) flooding.

Our UK flood maps include mapping of six flood types: river, surface water, coastal, groundwater, dam break and canal failure, giving you a very comprehensive view of your risk.

Flood map showing varying inundation depths across Lismore, Australia, with rivers and roads overlaid on terrain.

Continuous improvement

By distinguishing between different types of flooding and using 2D hydraulic modelling, we are able to simulate complex flooding to create our flood maps. Our commitment to quality, innovation and a regular programme of updates means we are trusted implicitly to supply the best quality data to our clients.

We're committed to ensuring our clients can access our data in a way that suits them. Our global flood maps are platform agnostic and available:

  • In-house directly from JBA
  • Via our wide range of resellers
  • As part of a consultancy service to help identify exposure hotspots, run per-risk flood assessments and manage accumulations

Get in touch today to find out more about our leading global flood maps. You can also read our full executive briefing which provides an overview of our global flood maps.
 

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Spotlight – South Africa Flood Map

South Africa has experienced a series of destructive floods in recent years, particularly in KwaZulu-Natal, the Eastern Cape and Gauteng, where intense rainfall has caused widespread disruption. These events have highlighted the country’s exposure to both river and surface water flooding, compounded by urban growth and the influence of a changing climate. High-resolution flood data remains vital to support risk management, planning, and resilience.

JBA’s recent update to our South Africa Flood Map applies enhanced methodologies and new data for even greater detail. Updated areas cover 73% of the population. 

What’s new in the update? 

  • New bare-earth Digital Terrain Model (DTM) for more precise elevation data
  • Updated land use data and new data to represent ground surface roughness for a better understanding of how flood water flows across the ground
  • Refined flood type classification improving distinction between river and surface water flooding
  • JBA expert hydrology combined with local gauge data for improved peak flow modelling
  • Expansion of defended area mapping with 83 flood defences included
South Africa flood map update Nov 25

Recent Flood Map Updates

  • South Korea Flood Map

    Better differentiation flooding between river and surface water along with new land use and terrain data has transformed the clarity and detail in this update

  • Canada Flood Map

    The latest biennial Canada flood map includes new digital terrain data, enhanced land use intelligence and expanded mapping of defended areas with a focus on key urban areas.

  • Chile Flood Map

    Now features updated DTM, land use, and flood extent data, focusing on regions where 97% of the population lives – including Santiago, Puente Alto, Temuco, and Antofagasta.

  • Colombia Flood Map

    Offers greater precision through new terrain data, improved floodplain detail, and updates to land use and defence mapping. Urban focus includes Bogotá, Medellín, Barranquilla, and Cali.

  • Peru Flood Map

    Delivers a clearer national picture with new DTM data, refined river and surface water classifications, and expanded land use and defence information.

JBA Vision

An easy-to-use web application to view our comprehensive global flood maps.

Read more

Flood risk analysis software displayed on a computer screen, showing flood depths on a map of eastern Australia.
  • Abstract digital chart with glowing blue and pink bars and lines, representing financial data, analytics, or market trends.

    Data

    The largest and most comprehensive data suite available for understanding current and future flood risk anywhere in the world.

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  • Abstract financial background with silhouettes, global map, and fluctuating graphs, symbolising data-driven or parametric analysis.

    Parametric

    Globally consistent high-resolution flood data to profile risk, enable anticipatory action, and identify triggers and monitor thresholds for parametric insurance.

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  • City skyline under cloudy sky with blue digital network overlay, symbolising data-driven urban analysis or flood risk assessment.

    Flood Risk Assessment

    Tailored flood risk insight for a specified location at property or postcode level, utilising JBA’s market-leading, high resolution flood maps and analytics.

    Read more

  • Silhouettes of people in a meeting room seen through glass, with a warm orange overlay and reflections of an urban cityscape.

    Consultancy

    Bespoke solutions and consultancy including tailored model builds, single site assessments, flood defence design and portfolio optimisation.

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