The NWS Sacramento forecasts a heatwave with temperatures over 100°F, mild nighttime relief, and advice to stay hydrated and limit outdoor activities.

The National Weather Service in Portland has issued an extreme heat warning, predicting temperatures up to 103°F and advising residents to take precautions against heat-related illnesses.

Denver is set for a rainy week with thunderstorms, starting with a 60% chance after 3pm and highs of 87°F, followed by cooler temps and possible severe storms with heavy rain risks.

Isolated showers and thunderstorms are forecasted after 9 a.m. with a high near 96°F, and a 20% chance of precipitation. Evening conditions will be partly cloudy with a low around 70°F.

San Antonio's forecast predicts mixed rain and sunshine with mid-90s temperatures and chances of afternoon showers increasing to 30 percent today. Heat index values could reach 101 degrees.

Houston anticipates heavy showers with a storm alert from 2-9 p.m., potentially exceeding a quarter of an inch in thunderstorms, and a humid, cloudy day reaching almost 90 degrees.

Detroit's weekly weather forecast predicts largely sunny days with a brief chance of weekend showers and thunderstorms, according to the National Weather Service.

Sunny weather with high 90s temperatures expected in Dallas, with potential isolated showers and thunderstorms, according to the National Weather Service.

A sunny and mild end to the week is forecast for eastern Wisconsin with possible scattered showers and thunderstorms early Saturday morning. Temperatures are expected to be near 80, followed by a clear weekend with no hazardous weather anticipated.

The National Weather Service in Memphis forecasts sunny skies and a high of 90 degrees today, with a cooler and clear night at 70 degrees. The weekend will be sunny with highs in the low 90s.

The National Weather Service in New Orleans forecasts showers, thunderstorms, and high humidity with chances of rain up to 80%. Temperatures will reach the high 80s to low 90s.

Sunny weather is expected in Oklahoma City, with a weekend high near 93 degrees and mild winds, but the forecast indicates showers and storms from Monday onward.

Pittsburgh's weather is described as average and dry due to a high-pressure system, with warmer temperatures expected before a weekend frontal system potentially brings precipitation and cooler weather.