Nashville’s heat ramps up fast, with temperatures near 101 degrees and heat indexes reaching 110 by Thursday. Slight storm chances offer only limited weekend relief.

Houston starts Tuesday clear and humid, but Tropical Storm Edouard is bringing heavy rain, thunderstorms and a flood threat through Wednesday morning.

Boston gets a wet, foggy start to September, with heavy rain possible and localized flooding concerns. A quieter Wednesday leads into another stormy turn Thursday.