The U.S. State Department issued a worldwide travel advisory on July 21, 2026, warning Americans to exercise increased caution due to heightened tensions in the Middle East. The advisory states:

The Department of State advises Americans worldwide to exercise increased caution.
Location: Worldwide
Event: Due to heightened tensions in the Middle East, the security environment remains complex with the potential for unforeseen escalation.
Americans currently in the Middle East should exercise caution and heightened vigilance and should be prepared for possible flight cancellations, periodic airspace closures, and potential travel disruptions. Please monitor embassy and consular security alerts, local authorities, and the news for breaking developments. Americans outside the Middle East should reconsider travel to and through the region.
U.S. diplomatic facilities, including outside the Middle East, have been targeted. Iran and groups supportive of Iran may target other U.S. interests overseas or at locations associated with the United States and Americans throughout the world.