The D.C. region will have another round of hot, muggy weather Sunday before a chance of severe thunderstorms arrives in the evening.
Sunshine will dominate most of the day, with humidity levels remaining high. Highs are expected to climb into the lower to mid-90s, with a chance of breaking record temperatures set in 1994.
However, an approaching cold front will create an unstable atmosphere, developing some showers and thunderstorms by the afternoon…