Puerto Rican cities hit with water rationing measures as record dry conditions persistJuly was the driest month on record for San Juan in more than 120 years and the second hottest for the capital. July was the driest month on record for San Juan in more than 120 years and the second hottest for the capital. July was the driest month on record for San Juan in more than 120 years and the second hottest for the capital. SAN JUAN, Puerto Rico -- Puerto Rico will implement water rationing measures in San Juan and other major cities as a drought grips the U.S. territory with no relief in sight. Puerto Rico previously implemented rationing measures in 2020 and in 2015, when some 400,000 utility customers received water only every third day.