G-P16 · TOPIC · humanitarian-riskGCRI dossier · service level R0
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Topic dossier · Society and Human Development

Humanitarian risk

Humanitarian risk is the chance that a crisis will overwhelm people's ability to cope and require outside assistance. It combines hazards and conflict, people's vulnerability and the capacity of institutions to respond. Assessing it helps agencies prepare and act early. This page sets out how humanitarian risk is analysed, how needs are estimated, and what evidence serves the humanitarian and development actors who use it. It names no third-party risk index.

01In brief

The short answer.

Humanitarian risk is the likelihood that a crisis will overwhelm people's capacity to cope and require outside assistance. It arises where hazards or conflict meet vulnerable people and weak response capacity, crises often compound, and early analysis lets agencies act before needs peak.

02Geography

Hazards now in Latin America and the Caribbean.

For humanitarian risk, in GCRI's spatial-intelligence reading, the map opens on population density, true-colour imagery and land cover, framed on Latin America and the Caribbean; every other NASA layer, live feed and forecast waits in the layer list.

The interactive map needs JavaScript; the layer list and sources are below.

Layers 3

Hazards now, for this page

Latest available

NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © OpenStreetMap contributors (ODbL) · Natural Earth

Loading the latest NASA imagery.

Drag to move. Ctrl or ⌘ and scroll, pinch or the buttons to zoom; hover for the values under the pointer; reset returns to the region.

For humanitarian risk, in GCRI's spatial-intelligence reading, the map opens on population density, true-colour imagery and land cover, framed on Latin America and the Caribbean; every other NASA layer, live feed and forecast waits in the layer list.Satellite and model products as NASA publishes them, each with its own date; indicators, not assessments of any place; claim ceiling INTEGRATED.

Data: NASA GIBS · ASTER GDEM · Blue Marble · © OpenStreetMap contributors · Natural Earth · NASA EONET · GDACS · Copernicus Sentinel-2 L2ASources and licences

  • We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Center for International Earth Science Information Network (CIESIN), Columbia University. 2018. Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11. NASA Socioeconomic Data and Applications Center (SEDAC). Licensed under CC BY 4.0. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). CC BY 4.0
  • VIIRS near-real-time products (flood, land surface temperature, snow cover, corrected reflectance), NASA LANCE; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • MODIS land products (vegetation indices, gross primary production, land cover), NASA LP DAAC and LANCE; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • VIIRS Black Marble night-time lights, NASA Goddard Space Flight Center; distributed by the NASA Level-1 and Atmosphere Archive and Distribution System (LAADS DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • ASTER GDEM is a product of METI and NASA (ASTER Global Digital Elevation Model V003, NASA LP DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. Public domain
  • © OpenStreetMap contributors (ODbL), via NASA GIBS (coastlines, boundaries, roads and place names). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). ODbL
  • Blue Marble, NASA Earth Observatory; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Context on the globe and flat map: coastlines, boundaries, roads and place names from NASA GIBS reference layers (OpenStreetMap data, ODbL, © OpenStreetMap contributors); Blue Marble imagery as an optional base; 3D terrain and the elevation read-out from the ASTER GDEM elevation colour index (5 m to 200 m classes, exaggerated for legibility). Boundaries are drawn as published and imply no position on any territory.
  • Globe: MapLibre GL JS 6.9.1, BSD-3-Clause, © MapLibre contributors.
  • Live: NASA EONET Events are indicative, not official warnings.
  • Live: GDACS (EC JRC / UN OCHA) Events are indicative, not official warnings.
  • Observed (EO): Copernicus Sentinel-2 L2A (contains modified Copernicus Sentinel data 2026), Microsoft Planetary Computer
  • Optional layers (35 sources in the layer list: live, forecast, observed and context) print their provider credit on the map and here when switched on; forecasts are model output and derived indices are estimates.

Layers and dates

  • Population density, 2020: Population: CIESIN, Columbia University, Gridded Population of the World v4.11 (2018), NASA SEDAC, CC BY 4.0 · static
  • True colour: VIIRS NOAA-20 corrected reflectance, NASA LANCE · 13 Oct 2026
  • Land cover type (IGBP), yearly: MODIS Terra and Aqua land cover (MCD12Q1), NASA LP DAAC · 2024
  • Vegetation greenness (NDVI), rolling 8 days: MODIS Terra NDVI, NASA LANCE · 13 Oct 2026
  • Flood water, 3-day composite: VIIRS Global Flood Product, NASA LANCE · 14 Oct 2026
  • Night-time lights, daily: VIIRS Black Marble (VNP46A2), NASA LAADS DAAC · 12 Oct 2026

03Console

Humanitarian needs overview, in outline.

The working screen behind this subject: its structure, terms and states. Names are placeholders and values illustrative.

Humanitarian needs overview: the screen's structure, terms and states for Humanitarian risk.Placeholder names and illustrative values; a design, not a record or a live system.
04The question

Humanitarian risk: how the risk develops.

Humanitarian and displacement analysis under safeguards. The dossier below sets out how the risk develops, what is measured, where the data come from, how it is modelled and who decides.

Mechanism

Hazard, vulnerability and capacity combine

Humanitarian need arises where hazards or conflict meet vulnerable people and weak response capacity, so all three must be assessed together.

Mechanism

Crises compound

Conflict, economic collapse, disease and disasters often occur together, with each making the others harder to address.

Mechanism

Early action needs early analysis

Analysis of risk before crises peak lets agencies preposition supplies and act early, which costs less than late response.

Mechanism

Needs estimates shape funding

Estimates of people in need drive appeals and allocations, so their methods and assumptions matter greatly.

05Key terms

Terms used on this page.

Each term as this page uses it. Where a standard-setting body defines the term, the wording follows that body.

TermDefinition
People in needThe estimated number of people whose wellbeing is threatened and who require humanitarian assistance.
Complex emergencyA crisis combining conflict, breakdown of authority and large-scale humanitarian need.
IPC phaseA level on the five-phase scale of acute food insecurity severity.
06Indicators

What is measured, and how well.

Each indicator carries its unit, its cadence, the kind of source behind it and the evidence label a value would carry. No values are shown: a programme supplies them under its own authority.

IndicatorUnitCadenceSource typeLabel
People in need of humanitarian assistancecountannualHumanitarian needs overviewsESTIMATED
Population in acute food insecuritypeople by IPC phaseper analysisIntegrated Food Security Phase ClassificationESTIMATED
Humanitarian appeal funding coveragepercent fundedannualOCHA Financial Tracking ServiceREPORTED
Conflict eventscountweeklyConflict event dataREPORTED
Anticipatory action triggers activatedcountper seasonAgency recordsREPORTED
Access constraintscount of reported incidentsmonthlyHumanitarian access monitoringREPORTED
07Canvas

From sources to decisions.

The topic as a computational graph: named sources feed the methods, an evidence review gates the outputs, and the decisions stay with the authorities that hold them.

Pipeline canvas · Humanitarian risk as a run graphDesign, not a record
Humanitarian risk: from needs assessment to accountable responseA joint needs assessment estimates people in need and severity; a response plan sets targets by sector; funding and delivery follow; monitoring and feedback from affected people adjust the response. Design of the process, not a record of a run.

Fig. 02Nodes carry their type, two metric rows and a state; connectors show what feeds what; dashed frames name the owners; the timeline is the cadence. Design of the pipeline, not a record of a run.

08Sources

Where the evidence comes from.

Named public datasets and institutional records, each with its licence class. Sources by agreement are used only under their terms and never republished.

SourceWhat it givesLicence class
OCHA Global Humanitarian Overview and Humanitarian Needs OverviewsPeople in need and appeal requirementsPublic, UN terms of use
Integrated Food Security Phase Classification analysesAcute food insecurity classificationsPublic, IPC terms
ACLED conflict event dataPolitical violence and protest eventsFree with registration, ACLED terms
OCHA Humanitarian Data ExchangeShared humanitarian datasetsOpen, licence per dataset
FEWS NET food security outlooksFood security projectionsPublic domain, US government (to check current status)
09Decisions

Who decides, and what the evidence serves.

Society and Human Development prepares evidence. The decisions below are taken by the authorities named, under their own rules, and never by the platform.

Who decidesThe questionEvidence this page serves
Humanitarian coordinators and agenciesWhere to prepare and prioritise assistanceRisk analyses; needs estimates
DonorsHow to allocate humanitarian and anticipatory fundingFunding and risk evidence
National disaster and social protection authoritiesHow to link national systems with humanitarian responseEarly action evidence

Outputs this topic produces

  • Humanitarian risk analyses combining hazard, vulnerability and capacity
  • Needs estimation method reviews
  • Early warning and early action evidence summaries
  • Evidence notes for humanitarian planning
10Core questions

The questions experts ask.

  • Where are crises likely to cause the greatest humanitarian need in coming months?
  • Which combinations of hazard, conflict and vulnerability drive that need?
  • How reliable are early indicators, and how much lead time do they offer?
  • How should uncertainty in forecasts be communicated to decision-makers?
  • Which data uses create risks for affected people, and how are they prevented?
11Mechanisms

Composite risk and early warning.

Humanitarian risk models typically combine three dimensions: hazard and exposure, including conflict; vulnerability of the population; and lack of coping capacity, including weak institutions and infrastructure. Indicators are aggregated into indices that rank or classify areas. Forecasting of food insecurity, displacement or disease outbreaks uses climate forecasts, market prices, conflict data and seasonal patterns to give warning before needs peak.

Anticipatory approaches link forecasts to pre-agreed actions, aiming to act before a shock becomes a crisis. Their value depends on forecast skill, the time needed to act and the cost of acting when the event does not occur. Conflict-driven crises are harder to anticipate than seasonal hazards, and compound crises challenge models built for single shocks.

Verification closes the loop. Comparing past forecasts with what actually happened shows whether indicators and models deserve trust, which thresholds work and where biases lie. Publishing that verification, including failures, is part of responsible humanitarian analysis.

12Methods and data

Methods and safeguards.

Indices

Composite indicators

Indices summarize risk across many indicators; weighting choices and data gaps shape results.

Forecasts

Predictive models

Statistical and machine-learning forecasts of need; skill varies and must be verified.

Safeguards

Responsible data

Aggregation, access controls and review prevent data from identifying or targeting people.

Limits: indices can mask local drivers, models trained on past crises may miss new patterns, and false alarms and missed events both carry costs. Data about locations of vulnerable groups can be dangerous in conflict settings.

13Methods

How it is studied, and what the methods cannot say.

14Questions

Questions and answers.

What is the IPC?
The Integrated Food Security Phase Classification, a common scale used by governments and agencies to classify the severity of food insecurity in five phases.
How is humanitarian need estimated?
Through joint analysis of surveys, assessments and secondary data that estimates how many people need assistance and in which sectors, with methods stated in each needs overview.
Why act before a crisis peaks?
Because early action based on risk analysis can protect lives and livelihoods at lower cost than responding after losses have occurred.
Does the platform issue humanitarian alerts?
No. It studies risk analysis methods and evidence. Alerts and appeals belong to humanitarian and national authorities.
Are risk rankings published?
Only in reviewed outputs with methods, uncertainty and safeguards, and never as a judgement of a government.
How are people protected in this analysis?
By aggregation, access control, review of every data use and a rule never to publish information that could locate or identify vulnerable people.
Society and Human Development

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