Overview

• Chicago’s heat wave hangs on through Monday with highs near 95°F and heat indices above 100°F, but forecasts show midweek highs dipping into the mid-80s.
• Northeast Ohio remains under an Air Quality Advisory through Monday as lingering smoke and humidity worsen conditions; a cold front on Monday brings a 50% chance of showers and potential strong storms.
• Boston stays under a heat advisory into Monday with heat indices in the 90s and rising storm risks later in the week as a frontal system moves in.
• The Met Office warns a third UK heatwave may begin around July 11, with central and eastern England likely to see temperatures reach 25–28°C and climb into the low 30s by the weekend.
• Cooling centers, rail speed restrictions and health warnings for vulnerable groups have been deployed across affected regions to counter prolonged heat and poor air quality.