The National Weather Service (NWS) has issued multiple Extreme Heat Watches across Montana, northern Wyoming, and Utah through Saturday and Sunday, July 11 and 12, 2026. Temperatures above 38°C (100°F) are forecast across the watch areas. Some areas could see potentially record breaking heat with isolated highs of up to 43°C (110°F) being forecast.
Health officials in New Jersey have increased the number of suspected heat-related deaths associated with last week’s extreme heat wave to 29, on Monday, July 6, 2026. A prolonged heat wave brought temperatures above 38°C (100°F) and dangerous heat index values approaching 43°C (110°F) across parts of the state over the Independence Day weekend. Most fatalities are yet to be certified as heat-related deaths by the forensics department, hence the toll remains preliminary.
LaGuardia Airport recorded an official temperature of 34.4°C (94°F) around midnight into July 4, 2026, establishing the station’s highest midnight temperature on record as an intense heat wave affected New York City and much of the northeastern United States. According to National Weather Service observations, the reading surpassed the previous midnight record of 33.9°C (93°F) set on July 18, 2013. The National Weather Service maintained Extreme Heat Warnings across much of the New York metropolitan area as dangerous heat persisted through the overnight hours.
A dangerous heat wave continued to intensify across much of the central and eastern United States on Friday, July 3, 2026. Numerous daily temperature records have already broken and more are expected through the Fourth of July holiday weekend. The National Weather Service (NWS) warned of widespread Major to Extreme HeatRisk and heat index values reaching 46°C (115°F).
Hungary recorded its highest temperature since observations began on June 30, 2026, when the temperature reached 42°C (107.6°F) in Szécsény, surpassing the previous national record of 41.9°C (107.4°F) measured in Kiskunhalas in 2007. The same heat wave also established a new all-time temperature record in Budapest and rewrote numerous national and capital daily maximum and minimum temperature records between June 29 and July 1, according to HungaroMet.
Slovakia set a new national all-time temperature record of 41°C (105.8°F) at Turňa nad Bodvou on June 29, 2026, as a late-June heat wave brought record daytime and overnight warmth to the country. The minimum temperature at Bratislava–Koliba fell only to 26.3°C (79.3°F) on June 27, the highest June minimum recorded within the Slovak Hydrometeorological Institute (SHMÚ) network since 1951.
The Czech Hydrometeorological Institute (CHMI) has confirmed a new all-time maximum air temperature for the Czech Republic after the Doksany meteorological station measured 41.9°C (107.4°F) on June 28, 2026, surpassing the previous national record of 40.4°C (104.7°F) set in 2012 during a historic late-June heatwave.
Poland’s western border town of Słubice reached 40.5°C (104.9°F) on June 28, 2026, breaking the station’s previous record of 39.5°C (103.1°F) from 1994 and surpassing the country’s historic temperature benchmark of 40.2°C (104.4°F) measured at Prószków in 1921, just one day after the town set a new national June record.
Extreme Heat Warnings, Extreme Heat Watches, and Heat Advisories are in effect across 31 U.S. states after the National Weather Service (NWS) issued a series of heat alerts on June 29, 2026. Peak heat index values are forecast to reach 46°C (115°F), with dangerous heat and humidity expected to persist into early July across parts of the Midwest, Northeast, Southeast, and central United States.
A strengthening upper-level ridge is forecast to intensify a prolonged and dangerous heat wave across much of the central and eastern United States through at least July 10, 2026, with temperatures in the low to upper 30s°C (90s to lower 100s°F) and heat index values reaching 38–43°C (100–110°F), locally up to 46°C (115°F).
