The National Weather Service forecasts scattered showers and thunderstorms for Pittsburgh, with a stalled front lifting northward. Uncertainty surrounds storm severity and timing, with drier weather expected for Monday.

Beachgoers in parts of Wisconsin are warned of dangerous conditions including high waves and currents, and the weather forecast indicates a mix of sun, clouds, and potential thunderstorms with varying temperatures.

Houston faces a heat advisory with temperatures reaching mid-to-upper 90s and heat index values hitting 104-106 degrees, as health officials advise hydration.

Orlando faces severe weather with beach and boating hazards due to Major Hurricane Erin, with a high risk of rip currents and an increase in showers and storms, possibly affecting boating and inland aviation.

Chicago faced intense storms, heavy rain, and power outages, with flood warnings and a heat advisory in effect. Conditions on Lake Michigan are hazardous due to high waves. The weather is expected to improve with mixed conditions ahead.

Dallas is under a Heat Advisory from the National Weather Service, with heat index values up to 107 and persistent high temperatures expected to continue. Precautions are advised to prevent heat-related illnesses.

Baltimore anticipates a weather shift with storms and cooler temperatures as a cold front approaches, while Hurricane Erin is predicted to remain offshore.

Heat warnings are in effect for San Antonio with temperatures expected to reach a heat index of 105 degrees and highs near 99. Evening temperatures will lower to around 77 degrees. Chances of showers and thunderstorms increase throughout the week.

A Dense Fog Advisory was issued in Raleigh, NC by the National Weather Service, warning of low visibility. The advisory lasts until 9 AM, with a high of 93°F expected later.

St. Louis faces a severe heat wave with a heat advisory in effect as temperatures reach 108 degrees, prompting warnings of potential heat illnesses and urging residents to take measures to stay cool.

Showers and storms are expected in Detroit today with a 50% chance of rain and a high near 84 degrees; conditions will improve tonight with a high near 80 degrees on Monday.

Jacksonville faces a classic summer storm week with showers and thunderstorms; temperatures may approach 90 degrees with a volatile mix of sun and rain throughout the week.

The article describes the upcoming weather forecast for Philadelphia, with a mix of sun, clouds, showers, and thunderstorms expected over several days.