A worsening water shortage linked to El Niño is forcing Panama to restrict traffic through its vital canal, threatening longer delays and higher costs across global shipping.
The Panama Canal is preparing for another reduction in daily ship traffic as worsening drought threatens the freshwater system that keeps one of the world’s busiest maritime shortcuts operating. From October, an average of 29.5 vessels a day is expected to cross the 82-kilometre canal, according to a draft plan submitted to Panama’s parliament. That would represent an 18 per cent reduction from the 36 vessels permitted daily in August, after authorities had already reduced September traffic to 32 ships.
The developing crisis is being driven by a problem that has little to do with shipping itself: there is not enough water. With El Niño expected to intensify later this year, one of the arteries of global commerce is once again being forced to operate below normal capacity. And the consequences are already visible. Ships have faced lengthy queues, transit costs have risen sharply and, in one reported case, a container ship paid about $4m to secure priority passage through the canal.
A global trade route running short of water
The Panama Canal connects the Caribbean Sea with the Pacific Ocean, providing ships with a shorter alternative to routes that would otherwise require them to travel around South America. Its importance to international commerce is difficult to overstate. The canal carries about 5 per cent of global maritime trade and around 40 per cent of US container traffic. It is particularly important for trade between Asia and the United States because using the waterway can reduce both travel time and transportation costs.
That efficiency is now being challenged by climate and weather conditions. Unlike a conventional sea passage, the Panama Canal depends heavily on freshwater. Its system of locks raises ships approximately 26 metres above sea level to Lake Gatun before lowering them again towards the opposite coast.
Each movement requires large quantities of water. The canal therefore cannot simply continue accepting vessels at its normal rate when the lake system supplying its locks falls below safe operating levels. Panama Canal authorities have been forced to balance two competing demands: keeping international shipping moving and protecting the water resources required to keep the canal functioning. The latest restrictions show how narrow that margin has become.
Why the October reduction matters
The planned October average of 29.5 vessels per day is not the first reduction this year. Traffic was still running at 36 vessels a day in August. By September, that figure had fallen to 32 as drought conditions worsened. The further reduction planned for October would bring the canal’s operating capacity significantly below the levels to which the shipping industry had become accustomed.
For shipping companies, fewer available passages mean greater competition for slots. Most vessels using the canal obtain reservations, while some available spaces are allocated through auctions. When demand rises, companies can bid against one another for priority access.
That system has already produced extraordinary prices. In August, ships reportedly faced waits of up to 10 days to enter the canal, the longest waiting period since May. Against that backdrop, one container ship was reported to have paid approximately $4m to move ahead in the queue.
The figure illustrates the economic value that can be attached to a few hours or days saved on a major international shipping route. It also demonstrates how a shortage of rainfall in Central America can translate into substantial costs for companies operating thousands of kilometres away.
El Niño is becoming the bigger concern
The immediate restrictions are serious, but the outlook is potentially more troubling. El Niño — a natural climate pattern associated with changes in Pacific Ocean temperatures and worldwide shifts in rainfall, winds and atmospheric conditions — is expected to reach its strongest point later this year.
The current event is forecast to be the strongest in four decades, raising the possibility that the water shortage affecting the Panama Canal could become more severe. Officials have already reported that rainfall across the canal’s watershed has fallen below expectations. That matters because the waterway does not operate independently of its surrounding environment. The rivers and reservoirs feeding Lake Gatun are central to the movement of ships through the locks.
Less rainfall means less water available for each transit. And as ships become larger, the demands placed on the canal’s water system become even more significant. The authority’s restrictions are therefore not simply an administrative decision to reduce congestion. They are also a measure intended to conserve water and maintain safe navigation.
The canal has faced this crisis before
Panama is not encountering the problem for the first time. In 2023, severe water shortages forced authorities to cut the number of daily transits from 38 to just 22. The reduction produced a major backlog, leaving vessels waiting to pass through and forcing shipping companies to consider alternative routes.
That experience remains important because it demonstrates what can happen when the canal’s capacity falls sharply. For companies dependent on predictable shipping schedules, delays can disrupt supply chains, increase operating expenses and complicate delivery planning. The present restrictions are not yet at the 2023 level, but the direction is being closely watched. If rainfall remains inadequate and El Niño strengthens as forecast, additional reductions cannot be ruled out. The result could be renewed pressure on shipping companies already dealing with a complicated global logistics environment.
A second pressure on global shipping
The Panama Canal problem is unfolding against an already unsettled international shipping landscape. The Guardian report noted that the war involving the US, Israel, and Iran, and disruptions around the Strait of Hormuz, have added complications and costs for shipping companies using the Panama route.
That makes the Panama Canal’s water shortage particularly significant. Global trade depends on a network of maritime corridors rather than one route. When a major passage becomes constrained, pressure can shift to other routes, ports and transport systems. A delay in one location can therefore become a cost elsewhere.
For businesses, the challenge is not simply finding a vessel. It is managing schedules, fuel, insurance, freight charges, port capacity and delivery commitments in an environment where strategic waterways can suddenly become less reliable. The Panama Canal is a particularly important part of that equation because its geographical position makes it a preferred shortcut for major trade flows linking Asia and the Americas.
The water is needed by people too
The canal’s dependence on freshwater also creates a domestic challenge for Panama. The lakes supporting the waterway are not simply industrial reservoirs. The same water system is important to the country’s population. The Guardian reported in August that the lakes feeding the canal also provide water for about half of Panama’s 4.2 million people.
That makes the debate over canal operations more complicated than a question of how many ships should be allowed through each day. The country has to manage water for a strategic source of international trade revenue while also safeguarding supplies for its population.
In periods of severe drought, those demands can come into sharper conflict. The canal authority’s restrictions consequently serve two purposes: protecting navigation and preserving the water resources on which the wider system depends.
The climate signal extends far beyond Panama
What is happening in Panama is part of a much broader pattern of extreme weather reported across several regions. According to an Agence France-Presse analysis of data from the European Union’s Copernicus climate programme, 52 countries across all continents recorded their hottest June-August period on record this year.
Nine countries in Central America and northern South America experienced their hottest June-August period on record, according to the same analysis. Africa has also been heavily affected. The report said more than a third of the world’s population experiencing record-hot northern summer conditions was in Africa, particularly across the Sahel and areas farther south.
Eighteen African countries, stretching from Mauritania and Sierra Leone in the west to Eritrea and Ethiopia in the east, recorded their hottest June-August period on record. The manifestations have differed from one region to another. Some areas have faced intense heat, others drought, while other parts of the world have dealt with wildfire smoke and other consequences of extreme weather. The Panama Canal presents a particularly striking example because the effects of a weather event are being felt directly through the global trading system.
What happens if the water keeps falling?
That is now the question hanging over the canal. The authority has already moved from 36 daily transits in August to 32 in September and plans an average of 29.5 in October. The possibility of further restrictions remains if rainfall does not improve. For the shipping industry, that would mean fewer opportunities to use a route specifically valued for reducing journey times and costs.
For Panama, it would mean managing an increasingly delicate balance between maintaining the canal as a global commercial asset and protecting the freshwater resources that make its operation possible. For the wider world, the episode offers another reminder that infrastructure built around predictable environmental conditions can become vulnerable when those conditions change.
The Panama Canal is an engineering achievement designed to make geography less of an obstacle to global trade. But the latest disruption demonstrates the limits of engineering when the resource required to operate the system — water — becomes scarce. The canal can control locks, regulate ship movements and auction scarce transit slots.
It cannot control rainfall. And as El Niño approaches its expected peak, the world’s shipping industry is once again waiting to see whether one of its most important shortcuts will have enough water to keep global commerce moving.