Washington, July 5 -- The Washington, DC region is under multiple weather and air quality alerts following storms over the '4th of July' celebration weekend, with officials warning of dangerous heat conditions and unhealthy air quality levels.

According to the US National Weather Service, a Heat Advisory has been issued for Sunday from 10 am to 8 pm (local time), with heat index values expected to reach up to 105 degrees Fahrenheit.

The District is also under an Extreme Heat Alert through 8 am on Monday, with authorities warning that daytime temperatures could feel at or above 105 degrees Fahrenheit, while nighttime conditions are expected to remain warm, with temperatures hovering around 80 degrees Fahrenheit, offering little relief. ...