A polar air mass originating from Antarctica brought record low temperatures to Argentina, Chile and Uruguay between June 30 and July 3, 2024, causing at least 15 deaths and prompting emergency shelter activation and gas supply restrictions across the region.
Sea surface temperatures in the western Mediterranean Sea reached up to 30 °C (86 °F) in early July 2025, with anomalies of 5–6 °C (9–10.8 °F) above average under strong to severe marine heatwave conditions.
Chile recorded some of its coldest temperatures in history on June 30, as a polar wave brought subzero conditions from the Altiplano to Patagonia. The extreme cold led to closure of a key border crossing between Chile and Argentina starting on July 1 due to ice and snow accumulations.
A heat dome settled over the United States beginning June 23, 2025, driving record-breaking temperatures across the Northeast and Mid-Atlantic. More than 245 million people experienced daytime highs above 32 °C (90 °F), with 33 million facing extreme heat above 38 °C (100 °F) by June 24. Cities like New York and Philadelphia saw historic highs and record-warm nights, leading to heat advisories and health warnings across 2/3rd of the US states.
A heat dome that formed over the central and eastern United States on June 20, 2025, has triggered record-breaking temperatures and extreme heat warnings across several states. Daily highs are forecast to exceed 38°C (100°F) in multiple major cities through June 24.
At least 78 people have died in severe flooding across South Africa’s Eastern Cape province, following a cold front that struck the region beginning June 7, 2025. Emergency crews remain active as of June 13, with the death toll expected to rise.
Intense rainfall in northeast India on June 1, 2025, caused widespread flooding and landslides, resulting in at least 36 fatalities and the displacement of thousands. In Silchar, Assam, a 24-hour rainfall total reached 415.8 mm (16.37 inches), marking the city’s heaviest downpour in over a century. Rivers in Assam flowed above the danger mark, making it one of the hardest-hit areas.
A record-breaking heatwave affected Iceland from May 6 to 15, 2025, with temperatures reaching 26.6°C (79.9°F) at Egilsstaðir Airport and setting a new national May temperature record. The 10-day event was described by the Icelandic Meteorological Office as the most significant May heatwave in the country’s meteorological history.
The United Arab Emirates recorded 51.6°C (124.9°F) in the town of Sweihan, Al Ain Region, Emirate of Abu Dhabi, at 13:45 LT (09:45 UTC) on May 25, 2025, breaking the country’s May temperature record for the second consecutive day, just 0.4°C (0.7°F) below the all-time national maximum.
Havana’s Casablanca weather station recorded 38°C (100.4°F) on May 20, 2025, setting a new May temperature record. This surpassed the previous high of 37.3°C (99.1°F) recorded on May 19, 2024, according to Cuba’s Institute of Meteorology (INSMET).
