WASHINGTON, D.C. (7News) — The Fourth of July will bring dangerous heat first, followed by a more serious severe thunderstorm threat into the evening hours across the DMV.
A severe thunderstorm watch has been issued for the District, parts of Maryland and northern Virginia until 10 p.m.
Extreme heat warnings and heat advisories also remain active, with heat index values climbing into the 105 to 110 range. A Code Purple Air Quality Alert is also in effect for the District of Columbia…