high-pressure system

Southern California is experiencing a heat wave with triple-digit temperatures expected in inland areas, driven by a high-pressure system and Santa Ana winds. Heat advisories remain in effect until Friday, with elevated fire risks due to dry conditions. The Coachella Valley faces extreme heat warnings, with temperatures reaching 116°F.

High temperatures in the 90s return to the Denver metro area Tuesday due to a high-pressure system, with cooler conditions in the high country. Air quality alerts persist from wildfires, and showers/storms are expected to move in Tuesday afternoon, potentially complicating firefighting efforts through flash flooding.

Metro Detroit experiences dangerous heat and humidity with high temperatures reaching 98°F and heat index values up to 107°F. A marginal risk of severe thunderstorms is expected Friday through Saturday, with potential for damaging winds, hail, and heavy rain. A high-pressure system breaking down will bring storm chances by the weekend, though heat index values will remain elevated through Sunday.

Western Europe experienced record-breaking temperatures in May due to a heatwave caused by a 'heat dome' of warm air from northern Africa trapped under a high-pressure system. The unusual heat, typically seen in summer, pushed mercury levels well above normal for the season.

Record-breaking warm temperatures in May across four Australian states will be replaced by a cold front bringing rain, thunderstorms, and cooler weather. The Bureau of Meteorology attributed the initial heatwave to a high-pressure system pulling warm northerly winds over southeast Australia.