Wisconsin DNR issues Air Quality Advisory due to Canadian wildfire smoke, affecting sensitive groups, with a parallel Beach Hazards Statement for dangerous Lake Michigan conditions.

Phoenix is expected to endure extreme heat with temperatures reaching 113 degrees, as per the National Weather Service. Residents are advised to take safety measures against the health risks associated with the heatwave.

San Antonio expects a high of 101 degrees today, remaining mostly sunny with slight evening cooling. Heat-related illness risks are present, with marginal relief throughout the week and intermittent chances of rain and thunderstorms.

Knoxville anticipates a hot and stormy day with a heat index of 101 degrees, reduced visibility due to fog, and intermittent thunderstorms, according to the NWS.

Boston's weather will fluctuate, with showers and potential thunderstorms followed by a cool Friday. The weekend will be sunny with temperatures rising on Sunday and Monday. Rain may return later in the week.

A heat advisory is in effect in central North Carolina until this evening, with heat indexes up to 108 and risks of thunderstorms and isolated flooding.

A cold front brings showers and the chance of thunderstorms across Ohio, with a temperature gradient expected. Cooler, drier air will settle in, leading to pleasant conditions towards the weekend.

The National Weather Service in Cleveland discusses the weather shift in the Ohio Valley, predicting a dry and cooler Friday after a wet Thursday, with a generally dry weekend ahead.

The National Weather Service issued a heat advisory for parts of Florida and Georgia, due to high temperatures and humidity. It warned of heat index values up to 111 degrees and advised taking precautions against heat-related illnesses.

The National Weather Service in Philadelphia warns of potential flooding due to heavy rain and thunderstorms, issuing a Flood Watch across several counties.

St. Louis can expect a 40% chance of rain before 4 pm with lows around 63 tonight. Clear skies follow into the weekend with sunny conditions and 80+ temps. Showers may return Monday.

The National Weather Service has issued a Flood Watch for Washington D.C., Maryland, and Virginia, warning of potential flash floods due to heavy rains and thunderstorms.

The National Weather Service in Pittsburgh PA issued a forecast warning of organized storms with damaging winds and heavy rain due to a cold front hitting the area this afternoon.