Lingering widespread heat is expected to trigger another round of severe weather and possible flash flooding in parts of the mid-Atlantic and South on Sunday.

July 4 heatwave: A severe heatwave is gripping millions across the US, threatening July 4th celebrations with record-breaking temperatures and dangerous humidity. Outdoor events…

Much of the nation was stewing under 90 to 100-degree heat, which is expected to move south and west by the beginning of next week.

Lingering widespread heat is expected to trigger another round of severe weather and possible flash flooding in parts of the mid-Atlantic and South on Sunday.

At least 18 record highs were set on July Fourth as celebrations kicked off in mid-Atlantic cities including Washington and Baltimore.

Severe weather is impacting multiple US states following Fourth of July storms. Dangerous heat advisories are in effect for the Mid-Atlantic and Arizona, with temperatures…