The U.S. State Department issued a high-level Worldwide Caution security alert on Thursday, July 23, 2026, warning American citizens overseas of an elevated risk of attacks amid escalating conflict with Iran. The advisory cites rapidly intensifying military hostilities in the Middle East and intelligence indicating potential retaliatory operations by Iran and allied proxy groups against U.S. interests, including businesses, schools, and diplomatic facilities. Americans in or near the region are urged to anticipate sudden flight cancellations, airspace closures, and significant travel disruptions. The alert follows 12 nights of U.S. airstrikes in Iran and President Donald Trump’s statement that he is weighing a “massive attack.”

Prepared by Rachel Morgan and reviewed by editorial team.