The US embassy in Israel warns American citizens in the Middle East of a possible "escalation", Sky News reports

On previous occasions the sequence has run from precautionary warnings to non-essential staff drawdowns, airspace disruptions, and then any kinetic event itself, with each step in that ladder carrying more weight than the last. A warning attributed to a media report rather than a formal State Department security alert sits at the softer end of that spectrum, and such notices have on many past occasions not been followed by any material event. The channels that have historically responded to genuine escalation in the region are crude through supply-risk premium, freight and insurance costs, gold, and the traditional safe-haven complex, while equity and credit reaction has tended to fade quickly where oil supply infrastructure stays untouched. The tells that have mattered in comparable episodes are whether the advisory is upgraded to ordered departure, whether other governments issue parallel warnings, and any movement of military assets or airline rerouting in the region. Absent those follow-ons, advisories alone have rarely sustained a repricing.