Panama Canal plans another vessel cut as El Niño drought lowers its water reserves

Another reduction for a constrained trade route

The Panama Canal plans to reduce average daily vessel transits to 29.5 from October as worsening El Niño-linked drought lowers water availability, according to a draft plan submitted to Panama's parliament. The new ceiling is 18 percent below the 36 daily passages recorded in August. Canal managers had already reduced the September allowance from 36 vessels to 32.

The decision matters well beyond Panama. The canal handles about 5 percent of global maritime trade and roughly 40 percent of United States container traffic. It offers a shorter connection between the Atlantic and Pacific, particularly for commerce linking Asia and the US. Fewer slots can produce longer queues, higher reservation-auction prices and pressure on shippers to accept slower or more expensive routes.

Fresh water sets the physical limit

Unlike a sea-level passage, the 82-kilometre canal uses locks filled with fresh water to raise ships approximately 26 metres to Lake Gatun and lower them on the other side. Rainfall in the watershed has been below forecasts. When the lake falls too far, the Panama Canal Authority must restrict traffic or vessel draft to conserve water and keep the largest ships within safe operating margins.

The latest restriction follows warning signs in August, when vessels were waiting around 10 days to enter, the longest delay since May. A container ship reportedly paid about $4 million through the canal's auction system to move ahead in the queue. The precedent from 2023 is also instructive: exceptionally low lake levels forced daily capacity from 38 vessels down to 22 and generated a major bottleneck.

The climate outlook remains adverse

FAO warned in June that a stronger-than-usual El Niño was forming and identified Central America's Dry Corridor and the Caribbean among regions with high drought exposure. A September assessment by the European Commission's Joint Research Centre subsequently found that El Niño-related drought had already devastated maize and bean harvests in parts of Central America. Those findings do not measure canal levels, but they corroborate the broader regional water stress.

The next variables are rainfall, Lake Gatun's level and the final form of the October operating plan. Further reductions would intensify competition for slots just as disruption around other strategic waterways is making route flexibility more valuable. Shipping companies will be assessing whether to reserve earlier, carry lighter loads or divert around longer ocean routes, while Panama must balance commercial throughput against drinking-water and lock-operation needs.