The Mid-Atlantic and Northeastern United States are bracing for a significant heat wave, with temperatures expected to reach the upper 90s and humidity making it feel even hotter, with heat index values potentially exceeding 100 degrees. New Jersey is forecasted to experience a mix of sun and thunderstorms over the next few days, with highs around 95 degrees and a continuous chance of afternoon showers. Similarly, Maryland and Washington, D.C. are anticipating extreme heat conditions, prompting alerts for Thursday and Friday due to the dangerous combination of high temperatures and humidity. Residents are advised to take precautions, such as staying hydrated, avoiding outdoor activities during peak heat, and checking on vulnerable individuals. The threat of thunderstorms is also present, particularly on Friday and Saturday, as conditions remain unstable. Overall, the region is facing a challenging weather pattern characterized by oppressive heat and scattered precipitation.