UNOSAT Tropical Cyclone IRMA-17. Population exposure analysis in Caribbean 11 September 2017 (Update 3)

Transcription

1 UNOSAT Tropical Cyclone IRMA-17. Population exposure analysis in Caribbean 11 September 017 (Update ) Population Exposure Analysis 11 September 017 Geneva, Switzerland UNOSAT Contact: Postal Address: unosat@unitar.org UNITAR UNOSAT, IEH T: (UNOSAT Operations) Chemin des Anémones 11, /7 hotline: CH-119, Genève, Suisse

2 Overview Hurricane IRMA moved across western, north-western counties of Florida and south-western Georgia on 11 September, weakening into a tropical depression. Over the next 8 hours, it is forecast to pass over Alabama and western Tennessee. Heavy rain and strong winds could affect these areas. Media have reported ten deaths across the United States. As of 1 September, damage and needs assessments are ongoing in the affected countries. Preliminary reports indicate that the most severely affected areas are Anguilla, Barbuda, British Virgin Islands, Cuba, Saint Martin, St Maarten, Saint Barthélemy and Turks and Caicos Islands. At least 5 people have been reported dead in the Caribbean. In addition, severe damages to infrastructure and health centers, loss of electricity and limited access to clean water are reported. Tropical cyclone JOSE continued moving north-northeast over the Atlantic Ocean, weakening but remaining a category 1 hurricane. Over the next hours, it could slowly turn toward south on 1 September and northwest on 1-15 September (ECHO Flash Updates). Based on observed tropical cyclone related data (JRC, NOAA-HWRF) released on 11 th September 017, building footprints (OSM) and spatial demographic data (WorldPop), UNITAR-UNOSAT has carried out a exposure analysis covering cyclone affected Islands in the Caribbean:

3 Population Exposed to sustained wind speed zones (as of 11 Sept. 017) : Tropical Cyclone IRMA-17 Country /Territory 1 Wind speed zones - Saffir Simpson Scale 5 exposed United States Virgin Islands 9,17 9, ,6 88,75 95 Sint Maarten 9, ,91 9, Saint Martin, ,19, British Virgin Islands 7, ,8 7,8 100 Anguilla 1, ,1 1, Saint Barthelemy 5, ,191 5, Barbuda 1, ,780 1, Cuba 11,66,80,78,659 67, 19,95 17,8 168,8,99 1 Bahamas,75 1, ,571 1 Turks and Caicos islands 5,00-1,00,857 9, , Puerto Rico,651, 1,196,151 98,80 1, ,596,786 Antigua 87,569 9,57 76,8 1, , Saba 1, , ,8 100 Sint Eustatius,90-1, , Saint Kitts and Nevis 8,059 6,98 1, , Dominican Republic 10,70,77 105, ,7 1 6,18,,776,781 56,8 0,17 56,97 168,901 5,579,589 1 The exposure has been calculated using a 1Km resolution WorldPoP dataset. This is a preliminary analysis & has not yet been validated in the field. Sources: Cyclone Track: Joint Research Center-GDACS (Warning 9 issued on 11 September 017 at 09:00 UTC) Surface wind data: NOAA-HWRF (11 September 017 at 06:00 UTC) Administrative Levels: GADM Spatial Demographic Data: WorldPop (015) Analysis: UNITAR-UNOSAT (07/09/017) Note: (*) of Caribbean is considering only the following countries and territories: Anguilla, Antigua and Barbuda, Bahamas, British Virgin Islands, Cuba, Dominican Republic, Puerto Rico, Saba, Saint Barthelemy, Saint Kitts and Nevis, Saint Martin and Sint Maarten, Sint Eustatius,Turks and Caicos Islands and United States Virgin Islands. These countries and territories are within surface wind data derived from NOAA-HWRF (11 September 017 at 06:00 UTC) %

4 Buildings Exposed to sustained wind speed zones (as of 11 Sept. 017) : Tropical Cyclone IRMA-17 Country /Territory 1 Wind speed zones - Saffir Simpson Scale 5 exposed buildings (**) United States Virgin Islands 9,17 1, ,016,106 Saint Martin, ,950 15,950 Sint Maarten 9, , 1, British Virgin Islands 7, ,057 10,057 Anguilla 1, ,055 7,055 Saint Barthelemy 5, ,7 5,7 Barbuda 1, ,6 1,6 Turks and Caicos islands 5,00-1,18 1,90 10, ,9 Cuba 11,66,80 71,66,986 1, ,65 Bahamas, ,15 Puerto Rico,651, 166,597 0,05 1, ,80 Antigua 87,569,61 6, ,757 Saba 1, Sint Eustatius,90-1, ,51 Saint Kitts and Nevis 8, Dominican Republic 10,70,77 1, ,8 6,18, 6,078 8,710 7,059 11,9 7,0 1,75 Sources: Cyclone Track: Joint Research Center-GDACS (Warning 9 issued on 11 September 017 at 09:00 UTC) Surface wind data: NOAA-HWRF (11 September 017 at 06:00 UTC) Building Footprints: HOT-OSM (11 September 017) Administrative Levels: GADM Spatial Demographic Data: WorldPop (015) Analysis: UNITAR-UNOSAT (07/09/017) Note: (*) of Caribbean is considering only the following countries and territories: Anguilla, Antigua and Barbuda, Bahamas, British Virgin Islands, Cuba, Dominican Republic, Puerto Rico, Saba, Saint Barthelemy, Saint Kitts and Nevis, Saint Martin and Sint Maarten, Sint Eustatius,Turks and Caicos Islands and United States Virgin Islands. These countries and territories are within surface wind data derived from NOAA-HWRF (11 September 017 at 06:00 UTC). (**) exposed buildings depends on the completeness of baseline data (building footprints) derived from HOT-OSM. Expected structural damage within sustained wind speed zones greater than 10 km/h according to the Saffir-Simpson Hurricane Wind Scale:

5 Map1: IRMA - 17 Cyclone path, wind speed zones and surface wind data. Download pdf map from here