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Storm-related outages at an Amazon data center in Ashburn prompted some congressional officials on Monday to question whether the federal government is moving too swiftly to put important data on private-sector cloud computing servers.

The outages affected companies such as Netflix and Pinterest, not the government. But several federal agencies have moved e-mail and other services to cloud servers, which are housed at remote data centers and typically managed by technology companies such as Amazon or Google.

The House subcommittee on commerce, manufacturing and trade is studying the risks of such moves and hopes to schedule a hearing on the matter ahead of the August congressional recess.

Last weeks powerful thunderstorms, along with the massive disruptions they caused, exposed some of the vulnerabilities of cloud computing, said the panels chairman, Rep. Mary Bono Mack (R-Calif.), in a statement. But I also believe the problems extend way beyond consumer convenience and customer service. There are some serious privacy issues which we need to look at as well.

The federal government has been aggressively embracing more extensive use of cloud servers since 2010 and closing government data centers. Cloud services allow for massive volumes of information to be stored remotely, generally on several different servers, so that it can be accessed from anywhere with an Internet connection. The data often is encrypted.

Government e-mail and Web sites were among the first to move away from government servers. More sensitive data is likely to follow, federal officials say, as cloud providers demonstrate they can provide the security and continuous access that agencies require.

Federal officials predict that the most sensitive information from the White House or CIA, for example may be moved eventually to cloud servers maintained by the government itself, allowing for maximum control and security.

The General Services Administration switched its e-mail to a Google cloud service last year, cutting its estimated costs from $30million to $15million over five years, said agency spokeswoman Casey Coleman. Outages, which used to come about once a month, have disappeared, she said.

The violent storm that blasted through the region Friday night disrupted power to several data centers at Amazons Web service facility in Ashburn. One of them lost both its primary and backup sources of power, causing outages that stretched into Saturday. No data was lost, Amazon has said. In April, the same facility also caused outages for Reddit, HootSuite, Quora and FourSquare.

Security is the highest priority for any business that deals with customer data and it remains the top priority for AWS, said Amazon spokesman Drew Herdener. Our scale enables us to invest in more security policing and countermeasures than almost any company can afford themselves.

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Friday’s storms raise questions about safety of cloud computing