Tropical Storm Isaias officially formed late Wednesday drenching the south of Puerto Rico with heavy rains as it spirals towards Hispaniola with a threat of flooding and landslides.
The U.S. National Hurricane Center in Miami said the storm was expected to cross the Dominican Republican and Haiti, which share Hispaniola, by early Thursday and the southeastern Bahamas by early Friday.
It’s following a path that could take it to the U.S. mainland by the weekend.
The storm carries the threat of three to ten inches of rain in some areas of Hispaniola before spiraling towards Florida and the eastern U.S.
Isaias had maximum sustained winds of 50 mph late Wednesday, centered 265 miles southeast of Santo Domingo, Dominican Republic, and was moving west-northwest at 20 mph.
Tropical Storm Isaias officially formed late Wednesday drenching the south of Puerto Rico with heavy rains and 50mph sustained winds. The storm pictured passing through Saint Thomas of the Virgin Islands above
![Heavy rains and vicious rains overcame Puerto Rico on Wednesday as the storm system officially became Tropical Storm Isaias](https://i.dailymail.co.uk/1s/2020/07/30/07/31358144-8574925-Heavy_rains_and_vicious_rains_overcame_Puerto_Rico_on_Wednesday_-m-10_1596089089811.jpg)
Heavy rains and vicious rains overcame Puerto Rico on Wednesday as the storm system officially became Tropical Storm Isaias
![A heat map satellite view of the storm as it upgraded from Potential Tropical Cyclone 9 to Tropical Storm Isaias pictured above](https://i.dailymail.co.uk/1s/2020/07/30/06/31356738-8574925-image-a-2_1596086321247.jpg)
A heat map satellite view of the storm as it upgraded from Potential Tropical Cyclone 9 to Tropical Storm Isaias pictured above
By Wednesday evening it was already beating the Virgin Islands and the Caribbean with thunderstorms and whipping winds.
On Tuesday afternoon into Wednesday night Puerto Rico suffered a massive power outage affected at least 400,000 customers throughout the island, hours ahead of the storm’s approach. By Wednesday evening 96,000 customers were without electricity.
The outage came as the Federal Emergency Management Agency claimed Puerto Rico was not prepared to respond to a ‘major event’ on top of a rising number of COVID-19 cases.
‘I don’t want people to lower their guards, because this system is quite dangerous,’ Ernesto Morales with the U.S. National Weather Service in San Juan said. ‘This is not (Hurricane) Maria, but it will bring a lot of rain.’
President Donald Trump approved an emergency declaration request from Puerto Rico’s governor, who also activated the National Guard.
The hurricane center said the storm was expected to swirl over Hispaniola and then pass between the eastern coast of Cuba and the southeastern Bahamas on Friday.
![The trajectory of the storm shows it will cross the Dominican Republican and Haiti, which share Hispaniola, by early Thursday and the southeastern Bahamas by early Friday](https://i.dailymail.co.uk/1s/2020/07/30/06/31356736-8574925-image-a-3_1596086324887.jpg)
The trajectory of the storm shows it will cross the Dominican Republican and Haiti, which share Hispaniola, by early Thursday and the southeastern Bahamas by early Friday
It then could cross through the central Bahamas on Saturday and possibly move on to southern Florida and the Carolinas, but the center said it was too early to predict the path that far, saying there is ‘large uncertainty after it leaves the Caribbean.’
Tropical storm warnings remained up for Puerto Rico, the British and U.S. Virgin Islands, St. Martin, St. Maarten, Saba, St. Eustatius, St. Barts, Turks and Caicos Islands and portions of Haiti, the Dominican Republic and the central Bahamas.
A tropical storm warning means that tropical storm conditions are expected within within 36 hours.
Forecasters warned that Isaias could drop three to six inches of rain, with up to 10 inches in isolated spots.
Puerto Rico is particularly vulnerable in the face of the incoming storm, with officials expressing concerns about the potential for landslides and flooding.
![As of Wednesday evening much of the Caribbean including the Dominican Republic, Puerto Rico and the Virgin Islands are under a Tropical Storm warning or watch](https://i.dailymail.co.uk/1s/2020/07/30/07/31358146-8574925-image-a-13_1596089182204.jpg)
As of Wednesday evening much of the Caribbean including the Dominican Republic, Puerto Rico and the Virgin Islands are under a Tropical Storm warning or watch
![The storm could make it to mainland US by the weekend, reaching Florida on Saturday and spiraling upwards into Sunday](https://i.dailymail.co.uk/1s/2020/07/30/06/31356694-8574925-image-a-8_1596088338371.jpg)
The storm could make it to mainland US by the weekend, reaching Florida on Saturday and spiraling upwards into Sunday
![A view of the rain forcast for the Caribbean on Thursday as of 5am above](https://i.dailymail.co.uk/1s/2020/07/30/06/31356732-8574925-image-a-4_1596088321238.jpg)
A view of the rain forcast for the Caribbean on Thursday as of 5am above
![A rainfall outlook for the weekend shows extremely heavy rain will pound the Caribbean islands, Florida and up the East Coast](https://i.dailymail.co.uk/1s/2020/07/30/06/31356726-8574925-image-a-5_1596088325358.jpg)
A rainfall outlook for the weekend shows extremely heavy rain will pound the Caribbean islands, Florida and up the East Coast
The US territory is also strugging with a spike in COVID-19 cases with more than 16,000 cases reported and over 200 deaths so far.
The island is also still reeling from the after effects of 2017’s devastating Hurricane Maria and a string of earthquakes earlier this year that damaged or destroyed hundreds of homes in the island’s south.
Puerto Rico’s power grid was destroyed by Maria and the rebuilt system is fragile and susceptible to failures, as experienced this week.
The Tuesday and Wednesday outage seemed to be related to a problem in a transmission line that connects both to natural gas power plant EcoEléctrica and Costa Sur, one of PREPA’s main power stations, according to the Miami Herald.
Officials said more than 300 shelters across the island were prepared to receive people if needed and that more than 130,000 face masks were available.
![A woman fishes at the Santo Domingo promenade, in Dominican Republic on Wednesday as Tropical Storm Isaias gained traction not so far away](https://i.dailymail.co.uk/1s/2020/07/30/07/31358148-8574925-image-a-11_1596089117677.jpg)
A woman fishes at the Santo Domingo promenade, in Dominican Republic on Wednesday as Tropical Storm Isaias gained traction not so far away
![A view of high waves slamming the old walls of San Juan, Puerto Rico pictured Wednesday](https://i.dailymail.co.uk/1s/2020/07/30/07/31358152-8574925-image-a-12_1596089120502.jpg)
A view of high waves slamming the old walls of San Juan, Puerto Rico pictured Wednesday
![A man transports wood before the arrival of the storm on Wednesday as vicious wave start to beat the edges of the city](https://i.dailymail.co.uk/1s/2020/07/30/07/31358460-8574925-image-a-26_1596089785585.jpg)
A man transports wood before the arrival of the storm on Wednesday as vicious wave start to beat the edges of the city
![A worker cleans the sewers before the arrival of Tropical Storm Isaias in San Juan, Puerto Rico on Wednesday](https://i.dailymail.co.uk/1s/2020/07/30/07/31358466-8574925-image-a-27_1596089788389.jpg)
A worker cleans the sewers before the arrival of Tropical Storm Isaias in San Juan, Puerto Rico on Wednesday
![The Tuesday and Wednesday outage seemed to be related to a problem in a transmission line that connects both to natural gas power plant EcoEléctrica and Costa Sur, one of PREPA’s main power stations, according to the Miami Herald. The Costa Sur Power Plant Complex in Guayanilla pictured above in August 2018](https://i.dailymail.co.uk/1s/2020/07/30/07/31358084-8574925-image-a-14_1596089266686.jpg)
The Tuesday and Wednesday outage seemed to be related to a problem in a transmission line that connects both to natural gas power plant EcoEléctrica and Costa Sur, one of PREPA’s main power stations, according to the Miami Herald. The Costa Sur Power Plant Complex in Guayanilla pictured above in August 2018
As Isaias spirals with strength the US is now bracing for the storm.
The National Hurricane Center projected the storm’s path shows the system could be located near or on either side of the Florida Peninsula by the weekend and gradually head northeast.
However, the trajectory of the storm could change as it passes through mountainous terrain of Hispaniola, long known as a hurricane shredder with mountains up to 10,000 feet elevation, which could slow the storm or break it altogether.
Isaias is the ninth named storm system of the 2020 Atlantic hurricane season.