Global IT outage: 24 hours later and impacts are still being seen across the world

Flights were grounded. Financial services disrupted. Hospital systems halted.

Public and private sector businesses around the world continue to be affected by the CrowdStrike outage, 24-hours after it sparked global chaos with airline, bank and other disruptions. While many businesses appear to have recovered, the issue has not yet been fully resolved.

The outage came from a faulty software update sent to computers running Microsoft Windows by a cybersecurity firm called CrowdStrike, causing flights to be grounded, disruptions to financial services and hospital systems to be knocked offline.

Rebooting systems multiple times worked for some agencies while others continue to be impacted, according to a U.S. Department of Homeland Security Cybersecurity and Infrastructure Security Agency report reviewed by ABC News.

Multiple U.S. government facilities have reported not being able to operate because they do not have access to multiple Microsoft 360 applications. Election related and voting registration databases in Arizona, South Dakota, Texas and Washington state were impacted by the outage as well, according to the report.

While American Airlines, United Airlines and Delta Airlines issued a global ground stop on Friday due to communications issues, TSA systems were not impacted, according to the report. There are at least 895 cancelled flights in the U.S. on Saturday, far fewer than the over 3,200 cancelations on Friday.

Emergency 911 systems that were affected by the outage switched to fully operational backup systems, according to the DHS report.

It was early Friday when reports started coming in that a tech outage was beginning to knock services offline across the globe, a cascading effect that would impact millions.

In an update Friday night, the company said they were "actively working with customers impacted" by the issue.

Hospital systems like Mass General Brigham, who halted elective and non-emergency surgeries yesterday, said they would be working through the night and expect to be fully operational on Saturday.

"We are doing everything possible to restore the electronic systems that support our patient care delivery across our system. Our teams will continue to work throughout the night to implement solutions and, at this time, we expect to be operational on Saturday, July 20, 2024," Mass General Brigham said in a statement late Friday.