Overall Red alert Tropical Cyclone for DELTA-20
in United States, Mexico, Cuba, Cayman Islands

Event summary

Tropical Cyclone DELTA-20 can have a high humanitarian impact based on the maximum sustained wind speed, exposed population and vulnerability.

GDACS ID TC 1000726
Name DELTA-20
From - To 04 Oct - 10 Oct
Exposed countries United States, Mexico, Cuba, Cayman Islands
Exposed population 1.9 million in Category 1 or higher
Maximum wind speed 231 km/h Category 4
Maximum storm surge 1.9 m (09 Oct 23:00 UTC)
Vulnerability Medium (Mexico)

GDACS Score

For more info on GDACS alert score click here.
Wind Storm surge Rainfall GDACS score
GDACS NOAA 56 km/h 1.9 m n.a. 0.5
Single TC: maximum expected impact (wind, storm surge, rainfall)
HWRF 234 km/h 2.3 m 489 mm 1.5
GFS 162 km/h 2.5 m 412 mm 0.5
ECMWF 140 km/h 2.2 m 593 mm 0.5
Maximum expected impact (wind, storm surge and rainfall) using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
The Caribbean, Mexico, USA - Tropical Cyclone DELTA (ECHO 06 Oct 2020)Tue, 06 Oct 2020 13:01

  • Hurricane DELTA is strengthening as it moves north-west towards the Yucatan Peninsula. On 6 October at 6.00 UTC its centre was 265 km south-south-east of Grand Cayman Island, with maximum sustained winds of 140 km/h (Category 1).
  • DELTA is forecast to pass south-west of the Cayman Islands on 6 October, approaching Yucatan peninsula and channel (already affected by Tropical Cyclone GAMMA) with maximum sustained winds up to 195 km/h (category 3) before continuing north-west over the Gulf of Mexico.
  • A hurricane warning is in effect for Cozumel Island and from Tulum to Rio Lagartos (Mexico), a tropical storm warning for the Cayman Islands, Pinar del Rio province (Cuba), Isle of Youth (Cuba), from Punta Herrero to Tulum and from Rio Lagartos to Progresso (Mexico).
The Caribbean, Mexico, USA - Tropical Cyclone DELTA update (ECHO 07 Oct 2020)Wed, 07 Oct 2020 13:03

  • Hurricane DELTA continues towards Yucatan Peninsula. It was approximately 175 km south-east of Cancún City (Quintana Roo State) on 6 October, with maximum sustained winds of 195 km/h (category 3).
  • According to media reports, evacuation orders have been issued for coastal Cancún and the city's convention centre has been established as a shelter.
  • DELTA is forecast to make landfall over the north-east of Yucatan Peninsula on 7 October, before approaching the coast of Louisiana on 9 October.
  • A hurricane warning has been issued for Cozumel Island and from Tulum to Dzilam (Mexico), a tropical storm warning remains in effect for Pinar del Rio Province (Cuba), Isle of Youth (Cuba), from Punta Herrero to Tulum and from Dzilam to Progreso (Mexico).
Mexico, USA - Tropical Cyclone DELTA update (ECHO 08 Oct 2020)Thu, 08 Oct 2020 13:04

  • Hurricane DELTA was approximately 190 km north of Progreso City (Yucatan, Mexico) on 8 October at 3.00 UTC, with maximum sustained winds of 148 km/h (Category 1), after passing over the Yucatan Peninsula and the Gulf of Mexico.
  • According to national authorities and media, 9 people were killed in Yucatan, Tabasco, and Chiapas States after storm-induced floods and landslides. Over 35,000 people have been evacuated to temporary evacuation centres in Yucatan.
  • DELTA is forecast to continue north over the Gulf of Mexico, reaching eastern Texas and southern Louisiana late on 9-10 October, with maximum sustained winds between 160-180 km/h.
  • A hurricane warning is in effect for coastal areas between eastern Texas and west-central Lousiana. Storm surge warnings have been issued from eastern Texas to central Mississippi. A tropical storm warning is in effect for eastern Texas and eastern Lousiana, including New Orleans.
USA - Tropical Cyclone DELTA update (ECHO 09 Oct 2020)Fri, 09 Oct 2020 13:07

  • Hurricane DELTA continues to approach Louisiana, approximately 490 km south-southeast of Houston (Texas) on 10 October at 6.00 UTC, with maximum sustained winds of 195 km/h (category 3).
  • According to media reports, areas of Louisiana are under mandatory evacuation orders and the authorities of Alabama and Mississippi have declared a state of emergency.   
  • DELTA is forecast to make landfall over the southern coast of Louisiana on 9 October as a Category 3 hurricane.
  • A hurricane warning is in effect from High Island (Texas) to Morgan City (Louisiana), a storm surge warning from High Island (Texas) to Ocean Springs (Mississippi). A tropical storm warning has been issued from West of High Island to Sargent (Texas), from East of Morgan City (Louisiana) to the mouth of the Pearl River, including New Orleans.
USA - Tropical Cyclone DELTA update Mon, 12 Oct 2020 13:10

  • Post-tropical remnants of DELTA continue to weaken and are located approximately 85 km north-east of Atlanta (Georgia).
  • According to media, following the passage of Hurricane DELTA that made landfall over southern Louisiana on 9 October, three people have died and 350,000 people remained without power.
  • For the next 24 hours, heavy rain is expected over the western States of the country.
USA - Tropical Cyclone DELTA update (ECHO 13 Oct 2020)Tue, 13 Oct 2020 13:09

  • After the passage of Hurricane DELTA that made landfall over southern Louisiana on 9 October, 4 people have died and over 9,400 residents have been displaced to shelters in Louisiana, as reported by media. More than 850,000 people remained without power across Louisiana, Texas, and Mississippi.
  • DELTA affected areas of Louisiana, already hit by the passage of Hurricane LAURA on 27-28 August.
  • Flood warnings have been issued for parts of south-western Lousiana. Rain is forecast over southern and eastern Texas, most of Lousiana and northern Mississippi and northern Alabama on 13-16 October.
Detailed event map. European Union, 2024. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

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Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (38), (2), DesInventar (1), WMO (1), INFORM (2),