Tropical Storm Chalene - Dec 2020
Extratropical Cyclone
How the score is calculated
The score starts at 8. It adds points from recorded affected, deaths, displaced and casualty counts, plus terms found in the story title, event type or status. For each count, only its highest matching band is used.
- Affected people
- 1–999: +5 · 1,000–9,999: +12 · 10,000–99,999: +20 · 100,000–999,999: +28 · 1 million+: +35
- Deaths
- 1–9: +8 · 10–99: +14 · 100–999: +22 · 1,000+: +30
- Displaced people
- 1–9,999: +6 · 10,000–99,999: +12 · 100,000+: +18
- Casualties
- 100 or more: +8
- Story wording
- +10 for terms such as catastrophe, famine, war, conflict, major earthquake, mass casualty or critical. Otherwise, +5 for active, ongoing, emergency, outbreak, cyclone or hurricane.
Score bands: Watch 0–24 · Moderate 25–49 · High 50–74 · Critical 75–100. Scores are capped at 100. Missing or unparseable figures add no points.
This is a rule-based WorldsAid triage indicator, not an official or independently validated classification. It does not account for recency or local context, and it can understate events with incomplete reporting. Check the linked sources.
Historical record
Status: CLOSED · Imported 2026-10-07
Closed for this historical import at the site owner’s request; not a new assessment of current conditions.
In brief
- What happenedThe tropical depression that formed earlier this week in the Indian Ocean intensified on 24 December into Moderate Tropical Storm Chalane.
- How many affectedThe cited sources do not yet provide a reliable affected-person total.
- What help is neededResponse priorities should be confirmed in the linked source reports as needs change.
What changed
First retained snapshot
No earlier verified snapshot is present in the recovered dataset. This record remains available as the historical baseline.
Situation
The tropical depression that formed earlier this week in the Indian Ocean intensified on 24 December into Moderate Tropical Storm Chalane. The tropical storm was located about 860 kilometres east of Antalaha District in Madagascar in the afternoon of 24 December and was moving at 17 km/h with an average wind speed of 75 km/h and gusts capping 100 km/h. According to Meteo Madagascar, Tropical Storm Chalane is predicted to continue to move westwards and to strike the north and centre-east coast of Madagascar on 27 December. Heavy rains are expected in the coastal areas starting on 26 December, which could lead to floods, mudslides and damage. The weather system may eventually emerge over the Mozambique Channel around 29 December and move towards central Mozambique, where Cyclone Idai hit nearly two years ago. According to Mozambique’s National Institute of Meteorology (INAM), projections indicate that the storm could impact the Mozambican coast on 29 or 30 December, affecting Nampula, Zambezia and Sofala provinces. After making landfall in Mozambique, the storm could proceed towards Zimbabwe, following a trajectory similar to Cyclone Idai, with Chimanimani District most at-risk according to current predictions. The Meteorological Services Department is on alert and monitoring the situation.
Linked charities and agencies
WorldsAid verification
A WorldsAid editor reviewed this record against 1 attributed source, cleaned feed formatting and checked the crisis, place and reporting date. No reliable human-impact total was promoted where the source did not provide one. Earlier observations remain in the evidence history instead of being silently overwritten.
What we knew when
- WorldsAid record entered the retained historical dataset.
- Last verification represented by this immutable snapshot.
Earlier figures are never replaced by later values; additional observations are retained as new ledger entries.
Provenance
This page renders the last verified WorldsAid cache directly in HTML. It does not treat generated summaries as primary evidence.
Cached dataset: worldsai_drup771.sql.gz
Verified
SHA-256 81e0335d065d985224d7f67d96c1989befd41fdad6e538edb8eac383d5b0b67a