Residents in the D.C. area should prepare for potentially severe weather conditions this week. Monday through Wednesday may see isolated to scattered thunderstorms, some of which could produce damaging winds. The high heat and humidity will increase the risk of heat-related illnesses, particularly for vulnerable populations such as the elderly and those with pre-existing health conditions. Flash flooding may also occur in areas experiencing heavy rainfall. The cold front later in the week could reduce humidity and bring cooler temperatures, but the timing and impact remain uncertain. (Source: Capital Weather)