View Photo Gallery: Homes and businesses across Washington, D.C., Maryland and Virginia lost power June 29 as one of the most powerful and punishing storms in months swept across the region.

Following the June 29 derecho, about 2.3 million Northern Virginia residents were without emergency 911 service for up to four days. The outage prevented hundreds, if not thousands, of calls from going through to emergency responders. While it appears that the outage didn’t create any life-threatening situations, ARL Now reports that Arlington County and Verizon are taking precautions to ensure that a 911 outage does not occur again in a similar situation.

In its report, Verizon said it has learned lessons from its 911 failure and will be improving its generator maintenance and redesigning some of its network systems to improve redundancy and reliability.

Read more on ARL Now .

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