Exposure · MHEWS

Data catalog Clear all

2 layers drawn: Population · Admin boundaries

Filter

No location selected — the map shows the whole country. District/Commune enable once a Region is chosen; if finer data is unavailable at the chosen level, the view falls back one level and flags the limitation.

Asset layers (elements-at-risk)

Population (2024, census) Buildings (2025, annual) Critical facilities (2026, annual) Roads & bridges (2025, annual) Agricultural land (2025, annual) Livestock (2025, annual)

Base & context

Administrative boundaries (ADM0–ADM4)

Exports the active asset layers for the current filter selection.

Legend & panel

Layers on map (2)

Population (2024, census)

0 – 1,000

1,000 – 5,000

5,000 – 15,000

15,000 – 50,000

50,000 – 150,000

> 150,000

Source: WorldPop, H3 resolution 6 (~36 km²/cell)

Opacity 100%

Admin boundaries

ADM1–ADM3 — reference layer, no severity

Opacity 60%

Exposure summary — Madagascar (national)

Reflects the active asset layers in the catalog above. Select a district on the map to re-scope this summary to that area.

Population, total residents	~29.6M
Population density (avg.)	~51 / km²

Turn on more asset layers (Buildings, Critical facilities, Roads & bridges, Agricultural land, Livestock) to add their national totals here. Full per-category breakdown for Analamanga: see the table below the map.

Sources

National census 2024 (population/buildings) · Ministry of Health facility registry (2026) · Ministry of Education (2025) · Ministry of Agriculture land-use survey (2025).

Top districts by exposure

Every exposure layer, ranked by district instead of totaled for one area — see the side panel for the live national/selected-area total, and each layer's vintage in the catalog and legend above.

Population, total residents (L-14, 2024)

1. Antananarivo Avaradrano	1,240,000
2. Antananarivo Atsimondrano	980,000
3. Toamasina I	410,000
4. Mahajanga I	340,000
5. Fianarantsoa I	305,000

Population, in flood-prone zones (L-14×L-09, 2024×2025)

1. Toamasina I	210,000
2. Antananarivo Avaradrano	142,000
3. Mahajanga I	96,000
4. Antananarivo Atsimondrano	88,000
5. Toliara I	54,000

Buildings, residential structures (L-15, 2025)

1. Antananarivo Avaradrano	218,000
2. Antananarivo Atsimondrano	176,000
3. Toamasina I	92,000
4. Mahajanga I	71,000
5. Fianarantsoa I	65,000

Health facilities (L-17, 2026)

1. Antananarivo Avaradrano	3 hosp., 14 clinics
2. Toamasina I	2 hosp., 10 clinics
3. Mahajanga I	1 hosp., 8 clinics
4. Antananarivo Atsimondrano	1 hosp., 7 clinics
5. Fianarantsoa I	1 hosp., 6 clinics

Schools (L-17, 2025)

1. Antananarivo Avaradrano	112
2. Antananarivo Atsimondrano	96
3. Toamasina I	74
4. Fianarantsoa I	61
5. Mahajanga I	58

Bridges / road crossings (L-16, 2025)

1. Toamasina I	31
2. Antananarivo Avaradrano	26
3. Mahajanga I	19
4. Fianarantsoa I	15
5. Toliara I	12

Agricultural land, ha (L-21, 2025)

1. Antananarivo Atsimondrano	52,000
2. Antananarivo Avaradrano	38,500
3. Fianarantsoa I	36,200
4. Toliara I	29,800
5. Mahajanga I	27,100

Livestock, head (L-22, 2025)

1. Toliara I	142,000
2. Antananarivo Avaradrano	96,000
3. Fianarantsoa I	88,000
4. Mahajanga I	74,000
5. Antananarivo Atsimondrano	61,000

Vintage shown per measure above (2024–2026, annual or census-based) — this standing reference data, not a hazard reading, is what Impact estimates (Human Impact, Sector Damage) are computed against when an alert is active.

Exposure SR-3

Top districts by exposure