The Puerto Rican government began rationing water in this Caribbean island's capital city Thursday because of a severe drought.
The key reservoir serving San Juan was down to 35% of its capacity, officials said.
"We all have to share the sacrifice," said Emilio Colon, executive director of Puerto Rico's Aqueduct and Sewer Authority. "We don't want to have to go to more extreme measures."
Parts of San Juan will be without water for 12 hours at a time, officials said. The cutoffs will be rotated through different neighborhoods.
Colon said other reservoirs were also drying up, and the water shortage may soon spread throughout the island of 3.6 million people.