Scorching temperatures and high humidity are expected across several regions, with heat indices reaching the upper 90s to 108 degrees. In New England, temperatures will be in the low 90s, with hazy skies due to wildfire smoke and moderate air quality. Maryland faces a heat advisory and code orange air quality alert, with thunderstorms likely through the weekend. London will also experience high humidity levels, peaking at 90 percent at times. Thunderstorms and scattered showers are forecasted for several areas, with the potential for flash flooding in the Mid-Atlantic. Cooler temperatures are expected next week, but humidity and storm chances will persist.