[REVISION HISTORY]

Extreme weather and atmospheric river in Chile and ARG

Updated 26 times since CLSTR started tracking revisions of this situation.

What changed

2026-09-24 02:52 UTC → 2026-09-24 13:26 UTC · added ~~removed~~

The atmospheric river system moving across central and southern Chile has intensified, with rainfall accumulations now forecasted to potentially reach between 100 and 310 millimeters in specific coastal and mountainous sectors between the Biobío and Los Lagos regions. Wind gusts are expected to persist between 60 and 80 km/h. In response to the escalating threat, SENAPRED has expanded Yellow Alerts to include the Los Ríos and Los Lagos regions, citing high risks of floods, landslides, and rockfalls. In Calbuco, the mayor has suspended activities for municipal schools and kindergartens. In Argentina, preventive measures have been implemented in provinces such as San Juan and Neuquén, where school activities and mountain access have been suspended due to intense storms and winds. The weather event is posing a significant threat to the agricultural sector. Experts warn that heavy spring rains may damage fruit flowering—specifically for vineyards, apples, and cherries—with potential crop losses reaching up to 50% in regions like Ñuble. In the Maule region, concerns have extended to the risk of fungal diseases and impacts on overall fruit quality. Meanwhile, the utility provider Saesa continues to monitor the electrical grid to mitigate supply disruptions.

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