Reservoirs
The Sierra Nevada snowpack has fallen to 59% of its historical average after weeks of sunny weather following Christmas storms. Experts note that full reservoirs and the remaining winter months mitigate concerns. Ski resorts continue to operate smoothly with artificial snow support.
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São Paulo's main reservoir system, Cantareira, saw a 0.1% drop in stored volume on January 1, 2026, reaching 20.1%, despite recent rains. This triggered the 'restriction' level, capping water withdrawals at 23 cubic meters per second, supplemented by the Rio Paraíba do Sul. Officials state there is no immediate risk of water rationing.