Washington, D.C. woke up sticky and steamy on Wednesday, July 15, 2026, with Reagan National already clocking about 73°F at 5:40 a.m. The warm-up is just the opening act: afternoon highs are expected to soar to around 102°F, and overnight lows are forecast to linger in the upper 70s to around 80°F. Residents should brace for dangerous heat in the midday and late-afternoon hours and cut back on outdoor exertion where they can.
Heat Advisory And Haze
The National Weather Service for Baltimore/Washington has posted a Heat Advisory from 11 a.m. to 8 p.m. Wednesday, July 15, warning of highs near 102°F and heat-index values that could reach about 106°F. Overnight lows are only expected to slip into the mid-to-upper 70s, which means very little relief after dark, and light west winds around 5-8 mph will not do much to take the edge off.
Forecasters are also flagging haze from smoke higher in the atmosphere that may drag down air quality across the metro through Friday. According to the NWS Baltimore/Washington, the combination of searing temperatures, humidity and hazy skies raises the risk of heat-related illness, especially for anyone working or exercising outdoors.
Plan For The Heat
Officials are urging basic but serious precautions: drink plenty of water, skip or scale back strenuous outdoor activity between late morning and early evening, and check in on older neighbors or anyone without air conditioning. The Mayor’s Office maintains an interactive cooling-center map and advises residents to call 311 or the Shelter Hotline at (202) 399-7093 for help and transportation to a nearby cooling site.
If you or someone around you starts showing signs of heat exhaustion - such as dizziness, nausea, heavy sweating or fainting - move to a cool place and seek medical help right away. Call 911 if symptoms are severe. Additional safety guidance is available from the Mayor's Office.
Looking Ahead
The oppressive heat is expected to hang on through Friday, with highs easing only slightly into the mid-to-upper 90s. A better chance for showers and thunderstorms arrives this weekend, with the most likely window for storms Saturday afternoon into the evening. Some storms could pack a punch with heavy downpours and gusty winds, so outdoor plans may need a backup option.
Temperatures are projected to slip back toward the low 90s by early next week, along with somewhat cooler overnight lows. It will still be hot, but compared with today’s blast-furnace feel, it might pass for a break.
