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Did Puerto Rico get electricity back?

In September 2017, Hurricane Maria made landfall in Puerto Rico as a Category 4 storm, causing widespread destruction across the island. The hurricane severely damaged Puerto Rico’s already fragile power grid, leaving the entire island without electricity. In the months following the hurricane, Puerto Ricans faced immense challenges restoring power across the island. Many questioned if and when electricity would be fully restored in Puerto Rico.

What damage did Hurricane Maria cause to Puerto Rico’s power grid?

Hurricane Maria inflicted catastrophic damage to Puerto Rico’s power infrastructure. Before the hurricane, Puerto Rico’s power grid was already in poor shape due to years of neglect, lack of maintenance, and the island’s ongoing financial crisis. But Maria was a devastating blow. The entire power grid was knocked offline during the hurricane. 80% of the island’s transmission towers were damaged or destroyed. All of Puerto Rico’s major power plants sustained damage, several beyond repair. Thousands of miles of transmission and distribution lines were damaged or rendered inoperable. The hurricane left the island’s entire power system in ruins.

What were the early challenges restoring electricity?

Restoring power to Puerto Rico after Hurricane Maria proved to be an enormously difficult and complex task. In the early months after the hurricane, Puerto Rico faced major obstacles getting the lights back on. Here are some of the main challenges:

– Sheer scale of the damage – The damage to the power grid was so extensive and widespread that it required a massive rebuilding effort across the entire island.

– Lack of supplies and resources – Restoration was hampered by logistical bottlenecks and shortages of basic supplies like poles, cables, transformers needed to rebuild damaged infrastructure.

– Access to damaged areas – Many roads and bridges were impassable after the storm, preventing crews from accessing damaged parts of the grid. Mountainous, remote areas were especially hard to reach.

– Lack of funds – Puerto Rico’s government and the island’s sole power authority (PREPA) lacked sufficient funds to properly cover the enormous costs of rebuilding the grid.

– Personnel shortages – PREPA did not have enough skilled workers to coordinate and carry out restoration efforts across the island. The agency had to contract outside crews.

– Technical challenges – Restoring power was technically complex. It required carefully synchronizing and energizing different parts of the system. Just because one area had power restored did not mean nearby communities could also receive power.

What was the initial progress on power restoration?

In the first month after Hurricane Maria, restoration efforts made slow progress getting the lights back on in Puerto Rico:

– 1 week after Maria: 97% of the island remained without power

– 2 weeks after: 91% without power

– 1 month after: 79% without power

– 6 weeks after: 65% without power

Several factors contributed to the slow initial pace of power restoration:

– Priority was given to stabilized power at critical facilities like hospitals first before focus shifted to residential areas

– Many areas were still completely inaccessible to crews weeks after the storm

– Lack of materials and supplies severely limited restoration abilities

– Uncertainty around funding delayed progress

– Extremely complex technical repairs were required at major power plants before generation could restart

So while some critical facilities regained power within weeks, broader progress restoring electricity to communities and homes was very slow initially.

When did power begin to be restored more substantially?

It took several months before power restoration gathered real momentum in Puerto Rico:

– 3 months after Maria: Nearly 65% of power restored

– 6 months after Maria: 93% of power restored

– 11 months after Maria: 99% of customers with power restored

What led to the turning point and increased progress?

– Improved access to damaged infrastructure as roads were cleared

– More supplies and workers reached the island, allowing repairs to accelerate

– Government and PREPA secured funding for restoration efforts

– Temporary fixes and emergency generators provided limited power as permanent repairs continued

– Major power plants like Costa Sur finally resumed generation after months of complex repairs

So while the first few months saw slow progress, there was a substantial shift around December 2017 as restoration efforts hit full stride. Millions of Puerto Ricans began to see their power switched back on.

When was power fully restored in Puerto Rico?

It took nearly 11 months for power to be fully restored across the island following Hurricane Maria.

The key milestone timeline:

– August 2018: 80% electrification 6 weeks ahead of schedule

– May 2018: 97% of customers with restored power

– August 14, 2018: 100% of customers with restored power on the island

On August 14, 2018, PREPA announced that it had officially restored power to the 1.47 million electricity customers across Puerto Rico. This marked 11 months of relief efforts after Hurricane Maria first knocked out power across the island.

The last remaining homes and communities that were still off the grid typically involved complex technical issues or remote locations with difficult access. But major repairs at substations and thousands of miles of transmission and distribution lines ultimately reconnected the entire island to the newly rebuilt power grid.

How many customers lost power due to Hurricane Maria?

Prior to Hurricane Maria making landfall in September 2017, Puerto Rico had approximately 1.57 million electricity customers according to PREPA.

When the hurricane struck the island as a Category 4 storm, 100% of those customers across Puerto Rico lost power – approximately 1.57 million customers in total initially lost electricity due to the hurricane and subsequent damage to the grid.

This represented the full blackout of the island. It marked the longest blackout in modern U.S. history and presented an unprecedented challenge to restore power across Puerto Rico.

What was the death toll from the blackout?

The months-long blackout in Puerto Rico caused by Hurricane Maria contributed to hundreds of additional deaths across the island.

The exact death toll is difficult to calculate. But various studies and mortality data have estimated the impacts:

– A Harvard study published in May 2018 estimated the death toll at over 4,600.

– Research in the New England Journal of Medicine estimated there were approximately 800 more deaths than normal in the three months after Hurricane Maria, although the study didn’t directly attribute the mortality to any specific causes.

– The official death count from the Puerto Rican government stands at 2,975 deaths attributed to Hurricane Maria in total based on estimates as of August 2018. This includes deaths caused both directly and indirectly by the storm.

There is no consensus on the precise number of fatalities. But most research confirms Hurricane Maria substantially increased the death rate in the months after the storm. Loss of power across the island was a major contributing factor by exacerbating health conditions and access to medical care. Estimates of hundreds or potentially thousands of excess deaths highlight the severe human impacts of the prolonged blackout.

What percentage of customers had power immediately after the hurricane?

Immediately after Hurricane Maria made landfall on September 20, 2017, 0% of Puerto Rico’s 1.57 million electricity customers had power.

The entire power grid was knocked offline as the Category 4 hurricane devastated the island’s electricity infrastructure. All of the main power plants went dark. Transmission towers toppled over. Distribution lines failed across the island. The blackout was total.

PREPA, the electric utility company of Puerto Rico, had to rebuild the grid from scratch. So in the immediate direct aftermath of Hurricane Maria, 100% of the island’s customers were left without electricity in the largest blackout in modern American history.

What percentage of customers were still without power 1 month after Maria?

One month after Hurricane Maria hit Puerto Rico on September 20, 2017, approximately 79% of electricity customers on the island were still without power based on data reported at the time.

On October 20, 2017, around 1.25 million out of 1.57 million total customers remained in the dark. Restoration efforts had managed to reconnect over 300,000 customers in the month after Maria. However, the vast majority were still without electricity due to the unprecedented scale of the damage.

In that first month, hospitals and water treatment plants were prioritized in power restoration. But most homes, businesses and community infrastructure remained offline. progress was also slowed by lack of supplies and lack of access to damaged areas. So one month into efforts, restoration remained a huge challenge with the vast majority of Puerto Ricans still powerless.

How many power restoration personnel were working in Puerto Rico?

At the peak of power restoration efforts in the months after Hurricane Maria, approximately 6,000 personnel were working to rebuild Puerto Rico’s electricity grid according to estimates.

The breakdown of the workers who helped restore power:

– 1,500 PREPA employees – Puerto Rico’s own electric company crews

– 1,000 other local crews hired as contractors

– 3,500 workers brought in from outside companies/utilities through mutual aid agreements – These specialized crews came from utilities across the the U.S. mainland.

Having thousands of experienced, skilled workers from places like New York and Florida was essential in eventually coordinating the complex grid repairs across the island’s severely damaged system. But it took weeks for mutual aid and contract workers to ramp up, leaving PREPA understaffed in the early stages of restoration.

How long did it take for 95% electrification after Maria?

It took approximately 8 months to restore power to 95% of electricity customers in Puerto Rico after Hurricane Maria caused a total island-wide blackout.

Key timeline:

– 1 month after Maria: 21% electrification

– 3 months after: 65% electrification

– 6 months after: 93% electrification

– 8 months after: 95% electrification

So while the early months saw slow progress with most of the island still in the dark months after the hurricane, there was a turning point around January 2018. After that point, power restoration accelerated substantially each month as repairs kicked into high gear. This allowed PREPA to the hit the key 95% restored milestone in May 2018 – about 8 months after the hurricane.

The last 5% took several more months of complex, remote grid repairs. But getting electricity to nearly all Puerto Ricans was a major feat less than a year after the devastation.

How much did power restoration cost?

The total cost to rebuild and restore Puerto Rico’s power grid after the devastating impacts of Hurricane Maria was estimated to be $3.2 billion according to data from the Federal Emergency Management Agency (FEMA).

The breakdown of power restoration costs:

– $2 billion from FEMA disaster relief funds awarded for grid reconstruction

– $1.07 billion spent by Puerto Rico’s government from general funds

– $235 million contributed via charitable donations, NGOs, private companies

Rebuilding damaged infrastructure like transmission lines and substations was extremely expensive. New equipment like utility poles, transformers and miles of cable had to be shipped en masse to the island. Tens of thousands of workers required payment. In total, bringing electricity back to Puerto Rico came at an enormous cost exceeding $3 billion by the end of the restoration efforts in mid-2018.

What new resiliency measures were taken?

As Puerto Rico’s grid was rebuilt after Hurricane Maria, efforts were made to reconstruct a more resilient power system able to better withstand future disasters. Some new resiliency measures adopted included:

– Stronger transmission towers – New metal latticed towers were used to replace damaged towers. These are rated to withstand winds up to 160mph.

– More redundant transmission lines – Building additional backup lines improves grid reliability if some lines fail.

– New grid control technology – New systems help grid operators isolate outages and reroute power.

– Vegetation trimming – Clearing vegetation around power lines reduces storm impacts and damage.

– Backup generators – More emergency generators allow critical facilities to maintain power during outages.

– Weather-resistant utility poles – Pole covers prevent water damage and corrosion.

– Microgrids – Small grid systems with local power generation can disconnect from the main grid to operate autonomously.

However, funding issues, bankruptcy proceedings, and political disputes have challenged major longer-term overhauls. Full modernization of Puerto Rico’s grid will require billions more in upgrades. But new grid resiliency remains a priority in the wake of Hurricane Maria.

Could another hurricane cause a similar island-wide blackout?

Despite improvements and rebuilding efforts, experts warn that Puerto Rico’s power grid remains highly vulnerable and another major hurricane could again cause an island-wide blackout.

Several risk factors that could lead to massive outages during future storms:

– Antiquated infrastructure – Much of Puerto Rico’s grid uses old, obsolete equipment from the 1960s and 1970s that is prone to failure. Complete modernization will take decades and billions more in funding.

– Geographic challenges – Puerto Rico’s mountainous terrain makes repairing lines to remote communities challenging. Most transmission lines cross forested mountains which are hard to access.

– Financial uncertainty – Ongoing debt crisis and bankruptcy has limited investment into grid upgrades. Lack of maintenance over decades increased Hurricane Maria’s impacts.

– Power plants in flood zones – Several major plants are located along Puerto Rico’s coast, increasing flood risk.

– Fragile transmission system – The transmission network remains very fragile with little redundancy. Failure in one part of the system can cascade across the island.

Though some resiliency upgrades were made, most experts agree the system remains highly vulnerable, especially as climate change may increase hurricane frequency or intensity. Preparing for the possibility of another major grid failure during future disasters remains a priority in order to avoid a repeated prolonged island-wide blackout.


Restoring power to Puerto Rico after Hurricane Maria stands as an epic feat of disaster response and grid reconstruction. It took 11 months of tireless work by thousands of people and over $3 billion in repairs and improvements to attain 100% electrification across the island’s 1.57 million customers after an absolute blackout.

But it also serves as a warning of how devastating and deadly extended power outages can be for modern societies. The task of transforming Puerto Rico’s antiquated, fragile grid into a robust, resilient power system remains an ongoing challenge. However, developing the capacity to maintain electricity in the face of disasters is essential for protecting communities in Puerto Rico and beyond. The unprecedented 2017 blackout cannot be allowed to become the new normal.