Overview
- Argentina’s meteorological service keeps an orange alert in place for the City and Greater Buenos Aires, with forecasts near 39°C and a chance of isolated storms late in the day before a frontal change brings cooler air on January 1.
- Yellow alerts warn of storms in parts of Jujuy, Misiones, eastern San Juan, northwestern San Luis and northeastern Mendoza, while strong-wind alerts cover southern Santa Cruz and Tierra del Fuego with gusts that could top 100 km/h.
- Central and northern provinces face peak heat with highs around 36–40°C, including Córdoba near 38°C, Santa Fe and Entre Ríos 37–38°C, and Buenos Aires province up to 38°C; Rosario could reach 40°C.
- Health guidance from national and provincial authorities stresses hydration, sun protection and special care for children, older adults and people with chronic conditions during the extreme heat.
- Peru’s Senamhi issues Advisory No. 466 through December 31 for Lima and 11 regions, citing stronger daytime heat, high UV radiation, gusty winds near 45 km/h and localized precipitation.