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Story summary
- Argentinian authorities closed tourist access to Iguazu Falls on Monday because river flow exceeded 12,000 m³/s.
- Park director José María Hervás said nonstop rain and dam releases caused the surge.
- Officials announced the falls would reopen Tuesday as flow began to decline.
- Meteorologists warn the 2026-2027 El Niño could become the largest on record, intensifying floods.