Key Takeaways
The Houthis’ announced naval blockade against Saudi Arabia could result in an expansion of the shipping crisis in the Middle East, as it will almost certainly increase the cost of shipping through the Red Sea by discouraging ships from transiting through the Red Sea. ISW-CTP has not recorded any Houthi attacks on shipping since July 7, 2025, at the time of this writing, but the Houthis ordered Saudi-bound vessels to turn back from Saudi Arabia over radio on July 20.
Iran is trying to expand the geographical scope of its conflict with the United States to the Red Sea to cause further disruption to international markets and impose additional costs on the United States.
The Houthis may have announced the blockade to deter Saudi Arabia from striking Houthi targets in Yemen to discourage further Saudi attacks, separate from but partially satisfying Iranian efforts to impose costs on the United States.
Some senior Iranian officials appear concerned that the renewed conflict will deepen Iran’s economic problems and threaten Iran’s internal security. Senior Iranian officials have previously appeared concerned that the conflict will deepen Iran’s economic problems, but these concerns do not appear to have meaningfully impacted the calculus of the IRGC.
US forces expanded strikes to possible missile launch sites in northwestern and central Iran.
Iran continues to coerce vessels by force to transit through Iranian territorial waters to prevent them from using routes through the strait that Tehran does not approve. Iran has attacked at least two vessels in the strait since ISW-CTP’s last data cutoff.
The IRGC released a statement on July 19 thanking the Jordanian people for providing Iran with information that has aided Iran’s recent attacks on Jordan, possibly to counter continuing reports that Russia and the People’s Republic of China have helped Iran target US assets in the region during the US-Israel-Iran War. The statement could also be part of recent broader Iranian efforts to mobilize the local populations in Arab countries against US forces.