The State Department issued a Worldwide Caution security alert on July 18, 2026, due to heightened tensions in the Middle East following exchanges of fire between the United States and Iran over the Strait of Hormuz. The announcement emphasized the complex security environment and advised Americans in the region to exercise caution and stay informed about developments.
The alert noted that U.S. diplomatic facilities, both in the Middle East and globally, may be targeted, and that groups supportive of Iran could attack U.S. interests. This warning came after the U.S. Central Command reported the deaths of two U.S. service members in Jordan due to an Iranian missile and drone attack. The U.S. has conducted strikes against Iran for seven consecutive nights following the collapse of a peace agreement earlier in the month.
The State Department's previous Worldwide Caution advisory was issued on March 22, 2026, shortly after fighting began between the two nations. The latest announcement also cautioned about possible flight cancellations and airspace closures. Iranian Supreme Leader Ayatollah Mojtaba Khamenei warned of severe consequences for continued U.S. attacks, while President Donald Trump indicated a willingness to escalate military operations, including potential ground invasions.