Houston faces a Saturday Heat Advisory with heat indexes potentially reaching 112 degrees. More 100-degree weather is expected Sunday and Monday.

Boston gets a mostly sunny Saturday near 85 before showers and thunderstorms return Sunday night and Monday.

Philadelphia gets a mostly quiet, hot Saturday before showers and thunderstorms ramp up Sunday night and Monday. Heavy rain could raise flash-flood concerns.

Pittsburgh gets a mostly dry Saturday before showers and thunderstorms arrive overnight. Sunday brings cooler temperatures, heavier rain chances and a marginal severe-weather risk.

D.C. will hit 91 degrees Saturday before thunderstorms and locally heavy rain arrive Sunday and continue into next week.

Cincinnati could see repeated thunderstorms Saturday, with flooding and a non-zero tornado threat. Storm chances continue through much of next week.

Columbus gets a brief calm start Saturday before afternoon thunderstorms bring tornado, wind and flooding concerns. More storms are expected Sunday and into next week.

Raleigh gets a hot, mostly dry Saturday before thunderstorms and localized flooding concerns develop Sunday and linger into midweek.

Cleveland gets one warm, mostly cloudy Saturday before heavy rain and thunderstorms take over Sunday. Lake Erie winds and waves will also build.

Orlando heats up to 92 degrees Saturday before thunderstorms bring lightning, gusty winds and localized flooding risks.

Charlotte could hit 90°F Saturday before thunderstorms become more likely after 3 p.m. A wetter, stormier Sunday follows.

Miami faces a heat index near 108 degrees Saturday before afternoon storms roll in. The wet pattern continues through much of next week.

Rain and thunderstorms are set to soak Indianapolis through Sunday, with possible flash flooding before a sunnier midweek break.