UPDATE (Aug. 16, 4 p.m.): The gas leak that evacuated Edison High School this morning has been sealed.

According to Fairfax County Public Schools spokesman Paul Regnier, the site has returned to normal.

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Edison High School was evacuated Tuesday morning after a gas line was struck during construction work.

The gas line, located near Edison's rear parking lot, was around 4 inches wide, according to Fairfax Fire and Rescue Deputy Chief James Walsh. As of 10:50 a.m., the line was still actively leaking, and could be heard from across the parking lot. 

After responding to the leak around 10:30 a.m., firefighters waited for a decision from Washington Gas, the company that operates the line, on the best way to shut it off. 

"You don't know what the impact is for neighbors," Walsh said.

No injuries have been reported. High winds helped reduce the threat from the gas by distributing leaked gas into the atmosphere instead of keeping it around the school, Walsh said.

A Fairfax County Public Schools spokesperson wrote in an email to Patch that the school was evacuated, although regular classes are not in session.