Washington (CNN) The Federal Emergency Management Agency's response to Hurricanes Harvey, Irma and Maria in 2017 was "hindered" by the agency's IT resources, which led to employees having to use personal computers and public wireless networks during its recovery effort, the Department of Homeland Security inspector general said in a report released Tuesday.

FEMA "has not implemented two essential IT management practices -- strategic planning and enterprise architecture development -- both necessary to effectively guide IT resources," the report states. The practices were mandated for all federal agencies "more than 20 years ago," and the IG's office has been reporting the issues in the new report to FEMA for 13 years.

The 46-page report comes as the agency prepares to respond to potential destruction brought by Hurricane Dorian, now a powerful Category 2 storm that is slowly heading toward the East Coast of the United States. The agency is still facing scrutiny for its response two years ago to Hurricanes Irma and Maria, which devastated parts of the US Virgin Islands and Puerto Rico, and Hurricane Harvey, which made landfall as a tropical storm near the Louisiana-Texas border.

In some cases, FEMA employees were instructed to perform official work in unconventional ways due to IT problems.

"For example, following the hurricanes and wildfires in 2017, some FEMA personnel used their personal laptop computers in place of FEMA's official systems to keep pace with mission requirements," the report said.

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