Why Does the Panama Canal Need Rain to Move Ships?
The Panama Canal connects two oceans. So how can it run out of water? It sounds impossible. The Atlantic Ocean is on one side. The Pacific Ocean is on the other. There is more than enough seawater. But the Panama Canal does not simply let ships float from one ocean to the other. It lifts them. And to do that, it needs fresh water. That is becoming a problem again. Rainfall around the canal has fallen sharply in 2026, and the Panama Canal Authority is preparing to reduce the number of ships allowed through each day. The reason is El Niño. But to understand why warm water thousands of miles across the Pacific can disrupt one of the world's most important shipping routes, you first need to understand something strange about the canal. It works a little like a giant water elevator. The Panama Canal Is Not a Flat River Imagine cutting a simple trench between the Atlantic and Pacific Oceans. A ship could enter one side, sail across and exit the other. That is not how t...