2024 Cyclone Chido
| General Information | ||||||||||||||
Context of the Activation Intense Tropical Cyclone Chido was a small but very powerful and destructive tropical cyclone which impacted Southeast Africa in December 2024. Chido made landfall at Agaléga in Mauritius on 11 December, peaking in intensity the following day. After passing through northern Madagascar, Chido briefly weakened but quickly regained intensity, before making its second landfall near Bandraboua, Mayotte on 14 December, before slightly weakening again later that day and making a third landfall near Pemba, Mozambique the following day; Chido made all three of its landfalls as a Category 4-equivalent intense tropical cyclone. Chido killed at least 89 people; 45 in Mozambique, 31 in Mayotte and 13 in Malawi, along with over 2,200 injuries. Mayotte in particular experienced catastrophic damage from Chido, with thousands of residents unaccounted for, most shanty towns completely destroyed and 85% of the island being left without power by 16 December. In Mozambique, 36,300 homes were badly affected and entire communities were destroyed, and nearly all structures in Agaléga were decimated by the cyclone. Relatively minor damage also occurred in the Comoros and Madagascar. (Source: Cyclone Chido Wiki) While initial mapping activities were focused on Madagascar, they later shifted to Mozambique and Mayotte (officially the Department of Mayotte, French territory) once it became clear that Chido particularly impacted the latter two. | ||||||||||||||
2024 Cyclone Chido
Contacts
- Coordination: Wilson Munyaradzi - Wilson.Munyaradzi@hotosm.org
- Support: Sam Colchester - sam.colchester@hotosm.org
- Support: Geoffrey Kateregga - geoffrey.kateregga@hotosm.org
Hashtag
All contributions are tracked with a unique change set comment tag: #chido
ohsomeNow Stats page for tracking overall contributions
Timeline
- Start: 12 Dec 2024
- End: Likely mid/end January 2025
Map and Data Services
Exporting OpenStreetMap data
- Search for country name and filter by HOT here: HDX
About This Disaster Activation
About HOT
To learn more about the Humanitarian OpenStreetMap Team (HOT), explore more of our wiki-pages (root: HOT) or our website hotosm.org. HOT is a global community, mostly of volunteers, and it is a US registered nonprofit able to contract with organizations (email info at hotosm.org to contact our staff), we are also a 501(c)(3) charitable organization.
History of this Activation
- 12 Dec 2024: Size up completed by Wilson Munyaradzi
- 12 Dec 2024: MapSwipe project for northern tip of Madagascar created in close collaboration with OSM Madagascar to detect built-up areas for rapid building digitization in anticipation of Cyclone affecting north
- 13 Dec 2024: Madagascar MapSwipe project completed in under 20 hours, but outputs not used for this response because fortuntely the Cyclone passed further to north than anticipated and only minor damage, mild flooding and power outages were reported
- 15 Dec 2024: 57 hour outage on OSM server started, during which no contributions could be made to OSM
- 17 Dec 2024: Outage on OSM server ended at 13:30 UTC
- 18 Dec 2024: HOT made contact with OSM France community
- 19 Dec 2024: After OSM France community member shared priorities in Mayotte, first HOT Tasking Manager project published and wider OSM community notified
- 27 Dec 2024: First Mozambique project published on Tasking Manager after built up areas were identified using MapSwipe
- 7 Jan 2025: OSM France published a special Mayotte building damage project on HOT's Tasking Manager, using post-disaster imagery provided by CNES / Airbus
Data Quality
Validation
Validation permissions for Tasking Manager projects are restricted to particular Tasking Manager Teams / users to ensure high quality validation:
- HOT Global Validators
- Validator Trainees
- MSF Validators
- Data Quality Interns
- Data Quality Interns 2022
For Mappers
How You Can Contribute
MapSwipe
Go to https://web.mapswipe.org/#/en and look for a Chido project. This is a very easy way to contribute, but please follow the tutorial if you have not used MapSwipe before.
Learn to Map
- Most of our volunteer needs are for remote OSM contributors, visit LearnOSM.org to get started.
Mapping Priority
- Please choose from highest priority first.
- We call for local mappers to prioritize local knowledge on the area.
HOT Tasking Manager
All HOT Tasking Manager projects and their progress can be seen here. For any projects that are marked 'Published', select the link in the Project ID column and it will launch the project and you will be able to contribute.
Mapping Instructions
For Mayotte
- For mapping buildings see project specific HOT Tasking Manager instructions.
- For building damage mapping see project specific HOT Tasking Manager instructions.