Overview
- Argentina’s weather service kept an orange heat alert in place for CABA/AMBA, with highs of 37–39°C Tuesday and Wednesday and unusually warm nights that raise health risk.
- Yellow alerts for thunderstorms cover at least nine provinces, including Jujuy, Salta, San Juan, San Luis, Mendoza, Misiones, Corrientes, Chaco and Formosa, with possible hail, strong gusts and 20–50 mm of rain.
- Forecasters expect isolated to locally strong storms during late afternoons and evenings through Thursday, so outdoor New Year’s dinners may need backup plans in areas such as Mendoza and the AMBA.
- Some outlets project exceptional heat on December 31 near or above 40°C in the AMBA, with mentions of readings above 42°C reported as developing and subject to official updates.
- Regional contrasts persist as Madrid readies for a cold, mostly dry New Year’s Eve near 0–8°C and Cancún faces rain today, while Patagonia contends with separate wind and rain alerts.