Overview
- Argentina’s national weather service placed Buenos Aires under an orange extreme-heat alert with highs around 37–39°C, warning of moderate to high health impacts for vulnerable groups.
- Yellow alerts for thunderstorms cover multiple provinces with risks of heavy rain, hail and strong winds, and Mendoza authorities recommend preparing indoor plans for New Year’s Eve.
- National forecasts point to mid-to-high 30s Celsius on December 31 with isolated to locally severe storms that could disrupt evening events, followed by a cooler change in the AMBA on January 1.
- Reports of temperatures above 42°C in Greater Buenos Aires are presented by some outlets as a high-end projection rather than the consensus forecast.
- Mexico’s Cold Front No. 25 is producing heavy to torrential rains in Oaxaca, Veracruz and Tabasco today, while Spain’s AEMET expects falling minimums around 0–1°C with weak frost across the Madrid region.