The Panama Canal is in danger.
And that danger is low water levels.
At its worst point last December, only 22 ships were allowed to pass.
The usual daily count is 36 to 38 ships per day.
More than 160 ships are lying at anchor at each end of the canal waiting to pass through.
The canal also faces frequent periods of El Nino when rain decreases.
A river named Rio Indio could be a source of water.
But, if it is dammed up, 2,000 poor people would lose their homes.
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