Heat wave threatens region through Fourth of July

A cloudy and unsettled weekend is giving way to a significant heat wave expected to grip the region next week, with potentially dangerous conditions forecast for the Fourth of July holiday. The immediate forecast calls for continued rain chances and cooler temperatures through Sunday.

On Saturday, widespread cloud cover and periods of rain, including some downpours and isolated thunderstorms, kept high temperatures in the 70s and low 80s for many areas. Some fog was also reported in northern zones during the morning. While dry periods were possible, scattered showers remained a threat throughout the day and into the evening. The pattern is expected to continue into Sunday, with cloudy skies and a chance of showers, though conditions may begin to dry out later in the day. Highs on Sunday are forecast to reach the mid-80s.

A notable shift is anticipated early next week as a warm front lifts northward. Monday is expected to bring mostly to partly sunny skies with more seasonable temperatures, likely reaching the upper 80s. However, humidity will begin to increase, making it feel several degrees warmer.

The most significant weather concern is a building ridge of high pressure that...