Hurricane Maria was an extremely powerful and catastrophic tropical cyclone that affected the northeastern Caribbean in September 2017, particularly in the U.S. territory of Puerto Rico, which accounted for 2,975 of the 3,059 deaths. It is the deadliest and costliest hurricane to strike the archipelago and island of Puerto Rico, and is the deadliest hurricane to strike the country of Dominica and the territory of the U.S. Virgin Islands. The thirteenth named storm, eighth consecutive hurricane, fourth major hurricane, and second Category 5 hurricane of the extremely active 2017 Atlantic hurricane season, Maria was the most intense and deadliest tropical cyclone worldwide in 2017. It was also the twelfth-most intense Atlantic hurricane on record, with a minimum central pressure of 908 millibars (26.8 inHg). Total monetary losses are estimated at upwards of $91.61 billion (2017 USD), almost all of which came from Puerto Rico, ranking it as the fourth-costliest tropical cyclone on record.
Maria developed from a tropical wave on September 16 east of the Lesser Antilles. Steady strengthening and organization took place initially, until favorable conditions enabled it to undergo explosive intensification on the afternoon of September 18, achieving Category 5 strength just before making landfall on the island of Dominica that night. After crossing the island and weakening slightly, Maria re-intensified and achieved its peak intensity with maximum sustained winds of 175 mph (280 km/h) and a pressure of 908 mbar (hPa; 26.81 inHg). On September 20, an eyewall replacement cycle weakened Maria to a high-end Category 4 hurricane by the time it struck Puerto Rico. The hurricane re-emerged weaker from land interaction, but quickly restrengthened back into a major hurricane again the following day. Passing north of the Bahamas, Maria remained a powerful hurricane over the following week as it slowly paralleled the East Coast of the United States, gradually weakening over time as conditions became less favorable. Maria then stalled and swung eastward over the open Atlantic, becoming extratropical on September 30 before dissipating by October 2.
Maria brought catastrophic devastation to the entirety of Dominica, destroying housing stock and infrastructure beyond repair, and practically eradicating the island's lush vegetation. The neighboring islands of Guadeloupe and Martinique endured widespread flooding, damaged roofs, and uprooted trees. Puerto Rico suffered catastrophic damage and a major humanitarian crisis; most of the island's population suffered from flooding and a lack of resources, compounded by a slow relief process. The storm caused the worst electrical blackout in US history, which persisted for several months. Maria also landed in the northeast Caribbean during relief efforts from another Category 5 hurricane, Irma, which crossed the region two weeks prior. The total death toll is 3,059: an estimated 2,975 in Puerto Rico, 65 in Dominica, 5 in the Dominican Republic, 4 in Guadeloupe, 4 in the contiguous United States, 3 in the United States Virgin Islands, and 3 in Haiti. Maria was the deadliest hurricane in Dominica since the 1834 Padre Ruíz hurricane and the deadliest in Puerto Rico since the 1899 San Ciriaco hurricane. This makes it the deadliest named Atlantic hurricane of the 21st century to date. The name Maria was later retired following the 2017 season.
Meteorological history
Maria originated from a tropical wave that left the western coast of Africa on September 12. Gradual organization occurred as it progressed westward across the tropical Atlantic under the influence of a mid-level ridge that was located to the system's north, and by 12:00 UTC on September 16, it had developed into Tropical Depression Fifteen, as deep convection consolidated and developed into curved bands wrapping into an increasingly defined center of circulation. At that time, it was located about 665 mi (1,070 km) east of Barbados. Favorable conditions along the system's path consisting of warm sea surface temperatures of 29 °C (84 °F), low wind shear, and abundant moisture aloft allowed the disturbance to consolidate and become Tropical Storm Maria 6 hours later, after satellite images had indicated that the low-level circulation of the wave had become well-defined.
Maria gradually strengthened, and by late on September 17, although the center had temporarily become exposed, a convective burst over the center enabled it to become a hurricane. Shortly afterward, explosive intensification occurred, with Maria nearly doubling its winds from 85 mph (140 km/h)—a Category 1 hurricane, to 165 mph (270 km/h)—a Category 5 hurricane, in just 24 hours, by which time it was located just 15 mi (24 km) east-southeast of Dominica late on September 18; the rate of intensification that occurred has been exceeded only a few times in the Atlantic since records began. Maria made landfall in Dominica at 01:15 UTC on September 19, becoming the first Category 5 hurricane on record to strike the island nation.
Entering the Caribbean Sea, Maria weakened slightly to a Category 4 hurricane due to land interaction with the island of Dominica, however it quickly restrengthened to a Category 5 hurricane and attained its peak intensity with winds of 175 mph (280 km/h) and a pressure of 908 mbar (hPa; 26.81 inHg) at 03:00 UTC on September 20 while southeast of Puerto Rico; this ranks it as the twelfth-most intense Atlantic hurricane since reliable records began. An eyewall replacement cycle caused Maria weaken to Category 4 strength before it made landfall near Yabucoa, Puerto Rico at 10:15 UTC (6:15 am local time) that day with winds of 155 mph (250 km/h)—the most intense to strike on the island since the 1928 San Felipe Segundo hurricane. Maria weakened significantly while traversing Puerto Rico, but was able to restrengthen to a major hurricane once it emerged over the Atlantic later that afternoon, eventually attaining a secondary peak intensity with winds of 125 mph (201 km/h) on September 22, while north of Hispaniola.
Maria then began fluctuating in intensity for the next few days as the eye periodically appeared and disappeared, while slowly nearing the East Coast of the United States, although southwesterly wind shear gradually weakened the hurricane. By September 25, it passed over cooler sea surface temperatures that had been left behind by Hurricane Jose a week prior, causing its inner core to collapse and the structure of the storm to change significantly. On September 28, a trough that was beginning to emerge off the Northeastern United States swung Maria eastward out to sea, while also weakening to a tropical storm. Periodic bursts of convection near the center managed to maintain Maria's intensity as it accelerated east-northeast across the northern Atlantic Ocean, but interaction with an encroaching frontal zone ultimately resulted in the storm becoming an extratropical cyclone on September 30, which continued east-northeastward, before dissipating on October 2.
Preparations
Upon the initiation of the National Hurricane Center (NHC)'s first advisories for the system that would become Tropical Storm Maria on the morning of September 16, the government of France issued tropical storm watches for the islands of Martinique and Guadeloupe, while St. Lucia issued a tropical storm watch for its citizens, and the government of Barbados issued a similar watch for Dominica. Barbados would later that day declare a tropical storm watch for its citizens and Saint Vincent and the Grenadines. The government of Antigua and Barbuda issued Hurricane watches for the islands of Antigua, Barbuda, St. Kitts, Nevis, and Montserrat by the time of the NHC's second advisory which declared Maria a tropical storm. The Dominican Republic activated the International Charter on Space and Major Disasters for humanitarian satellite coverage on the 20th.
Puerto Rico
Prior to both Hurricanes Irma and Maria, the Puerto Rico Electric Power Authority (PREPA), already struggling with increasing debt, had seen budget cuts imposed by PROMESA as well as the loss of 30 percent of its work force since 2012. With the median age of PREPA power plants at 44 years, an aging infrastructure across the island made the electric grid more susceptible to damage from storms. Inadequate safety mechanisms also plagued Puerto Rico's electric company, and local newspapers frequently reported on its poor maintenance and outdated control systems.
According to the non-profit environmental advocacy group Natural Resources Defense Council, the island's water system was already in substandard conditions prior to hurricanes Irma and Maria. The NRDC reported that seventy percent of the island had water that did not meet the standards of the 1974 Safe Drinking Water Act.
Still recovering from Hurricane Irma two weeks prior, approximately 80,000 remained without power as Maria approached. FEMA's Caribbean Distribution Center warehouse, its only emergency stockpile in the islands, is located on Puerto Rico. By September 15, 2017, 83% of the items there, including 90% of the water and all of the tarps and cots, had been deployed for post-Irma relief, mostly to the U.S. Virgin Islands. Maria arrived before supplies were replenished.
Evacuation orders were issued in Puerto Rico in advance of Maria, and officials announced that 450 shelters would open in the afternoon of September 18. By September 19, 2017, at least 2,000 people in Puerto Rico had sought shelter. Using anonymous aggregate cell phone tracking data provided by Google from users that opted to share location data, researchers reported that travel from Puerto Rico increased 20% the day before the hurricane made landfall. Puerto Rican travelers often chose to go to Orlando, Miami, New York City, and Atlanta. Internally, there was an influx of people into San Juan.
Mainland United States
As Maria approached the coast of North Carolina and threatened to bring tropical storm conditions, a storm surge warning was issued for the coast between Ocracoke Inlet and Cape Hatteras, while a storm surge watch was issued for the Pamlico Sound, the lower Neuse River, and the Alligator River on the morning of September 26. A state of emergency was declared by officials in Dare and Hyde counties, while visitors were ordered to evacuate Hatteras and Ocracoke islands. Ferry service between Ocracoke and Cedar Island was suspended the evening of September 25, and remained suspended on September 26 and 27, due to rough seas, while ferry service between Ocracoke and Hatteras Island was suspended on September 26 and 27. The port in Morehead City was closed by the United States Coast Guard on the morning of September 26. Schools in Dare County closed on September 26 and 27, while schools in Carteret and Tyrrell counties, along with Ocracoke Island, dismissed early on September 26, in anticipation of high winds. Schools in Currituck County were closed on September 27, due to high winds.
Impact in the Lesser Antilles
Windward Islands
The outer rainbands of Maria produced heavy rainfall and strong gusts across the southern Windward Islands. The Hewanorra and George F. L. Charles airports of Saint Lucia respectively recorded 4.33 and 3.1 in (110 and 79 mm) of rain, though even higher quantities fell elsewhere on the island. Scattered rock slides, landslides and uprooted trees caused minor damage and blocked some roads. Several districts experienced localized blackouts due to downed or damaged power lines. The agricultural sector, especially the banana industry, suffered losses from the winds.
Heavy rainfall amounting to 3–5 in (76–127 mm) caused scattered flooding across Barbados; in Christ Church, the flood waters trapped residents from the neighborhood of Goodland in their homes and inundated the business streets of Saint Lawrence Gap. Maria stirred up rough seas that flooded coastal sidewalks in Bridgetown and damaged boats as operators had difficulties securing their vessels. High winds triggered an island-wide power outage and downed a coconut tree onto a residence in Saint Joseph.
Passing 30 mi (48 km) off the northern shorelines, Maria brought torrential rainfall and strong gusts to Martinique but spared the island of its hurricane-force windfield, which at the time extended 25 mi (40 km) around the eye. The commune of Le Marigot recorded 6.7 inches (170 mm) of rain over a 24-hour period. By September 19, Maria had knocked out power to 70,000 households, about 40% of the population. Water service was cut to 50,000 customers, especially in the communes of Le Morne-Rouge and Gros-Morne. Numerous roads and streets, especially along the northern coast, were impassible due to rock slides, fallen trees and toppled power poles. Streets in Fort-de-France were inundated. In the seaside commune of Le Carbet, rough seas washed ashore large rocks and demolished some coastal structures, while some boats were blown over along the bay of the commune of Schœlcher. Martinique's agricultural sector suffered considerable losses: about 70% of banana crops sustained wind damage, with nearly every tree downed along the northern coast. There were no deaths on the island, although four people were injured in the hurricane—two seriously and two lightly. Agricultural loss were estimated at US$42 million.
Dominica
Rainfall ahead of the hurricane caused several landslides in Dominica, as water levels across the island began to rise by the afternoon of September 18. Maria made landfall at 21:15 AST that day (1:15 UTC, September 19) as a Category 5 hurricane with maximum sustained winds of 165 mph (266 km/h). These winds, the most extreme to ever impact the island, damaged the roof of practically every home—including the official residence of Prime Minister Roosevelt Skerrit, who required rescue when his home began to flood. Downing all cellular, radio and internet services, Maria effectively cut Dominica off from the outside world; the situation there remained unclear for a couple of days after the hurricane's passage. Skerrit called the devastation "mind boggling" before going offline, and indicated immediate priority was to rescue survivors rather than assess damage. Initial ham radio reports from the capital of Roseau on September 19 indicated "total devastation", with half the city flooded, cars stranded, and stretches of residential area "flattened".
The next morning, the first aerial footage of Dominica elucidated the scope of the destruction. Maria left the mountainous country blanketed in a field of debris: Rows of houses along the entirety of the coastline were rendered uninhabitable, as widespread floods and landslides littered neighborhoods with the structural remnants. The hurricane also inflicted extensive damage to roads and public buildings, such as schools, stores and churches, and affected all of Dominica's 73,000 residents in some form or way. The air control towers and terminal buildings of the Canefield and Douglas Charles airports were severely damaged, although the runways remained relatively intact and open to emergency landings. The disaster affected all of the island's 53 health facilities, including the badly damaged primary hospital, compromising the safety of many patients.