Residents across Tehran woke to darkness early Monday as a fresh wave of Israeli airstrikes knocked out power across large sections of the Iranian capital — the most dramatic escalation yet in a war now entering its fourth week with no end in sight.
The blackouts, reported by the New York Times and confirmed by Iranian state media, came as President Donald Trump’s explosive 48-hour ultimatum to Iran approaches its deadline tonight. The president demanded Iran “fully open” the Strait of Hormuz or face the total destruction of its power grid — a threat that could plunge 90 million Iranians into indefinite darkness and trigger humanitarian catastrophe across the entire Persian Gulf region.
Meanwhile, the International Energy Agency dropped a bombshell assessment Monday morning: the current energy crisis now exceeds the combined impact of the 1970s oil shocks and Russia’s 2022 gas disruption — making it the worst energy emergency in modern history.
Tehran Plunged Into Darkness After Overnight Israeli Strikes
The Israeli military confirmed early Monday that it had launched another “broad wave” of strikes on infrastructure targets in Tehran, its latest salvo in a sustained aerial campaign that has hammered the Iranian capital almost nightly since the war began on February 28.
The New York Times reported that residents described “blackouts across large parts of Tehran” following the strikes, which hit multiple areas of the city in the pre-dawn hours. The Iranian Red Crescent posted video of a residential building in affluent northern Tehran with its facade destroyed, emergency workers pulling survivors from the rubble on stretchers.
Iranian news agencies reported six people killed and 43 injured in strikes on residential buildings in the western city of Khorramabad alone. The total civilian death toll from the war has now surpassed 2,000, according to Reuters, with Iran’s internet blackout entering its fourth consecutive week — cutting millions of civilians off from independent information and emergency alerts.
NPR reported that the monitoring group NetBlocks confirmed the internet shutdown “adds to the wartime distress of millions of civilians who lack independent sources of information and alerts.”
Trump’s 48-Hour Deadline: What Happens Tonight?
The clock is ticking. President Trump issued his ultimatum on Saturday via Truth Social, posting: “If Iran doesn’t FULLY OPEN, WITHOUT THREAT, the Strait of Hormuz, within 48 HOURS from this exact point in time, the United States of America will hit and obliterate their various POWER PLANTS, STARTING WITH THE BIGGEST ONE FIRST!”
That deadline expires at approximately 7:44 PM EDT (11:44 PM GMT) tonight, Monday, March 23.
Iran has shown zero indication it will comply. Instead, the Revolutionary Guards issued a defiant statement Monday morning: “If you hit electricity, we hit electricity.” The IRGC warned it would target Israel’s power plants and those supplying U.S. military bases across the Gulf if Trump follows through on his threat.
Iran Threatens to Mine the Entire Persian Gulf
In perhaps the most alarming escalation of the day, Iran’s Defence Council went even further — threatening to lay sea mines across all Gulf shipping routes, not just the Strait of Hormuz, if the U.S. attacks Iranian coastal territory.
“Any attempt to attack Iran’s coasts or islands will cause all access routes in the Gulf to be mined with various types of sea mines, including floating mines that can be released from the coast,” the Defence Council stated via Iranian state media. “In this case, the entire Gulf will practically be in a situation similar to the Strait of Hormuz for a long time.”
This would be catastrophic. The Strait of Hormuz carries roughly one-fifth of the world’s oil and liquefied natural gas supply. Mining the entire Gulf would effectively cut off energy exports from Saudi Arabia, the UAE, Qatar, Kuwait, and Bahrain — creating a supply crisis of almost unimaginable proportions.
Iran’s representative to the International Maritime Organisation attempted to soften the message Sunday, claiming the strait “remains open” to all shipping except vessels linked to “Iran’s enemies.” Indian and Pakistani vessels have reportedly been allowed safe passage, but Western-flagged shipping remains paralyzed.
IEA: Worst Energy Crisis in Modern History
The International Energy Agency’s executive director, Fatih Birol, delivered a stark warning Monday that the Hormuz crisis has now surpassed every previous energy emergency on record.
According to Birol, the disruption “exceeds the last three shocks combined” — referring to the 1973 Arab oil embargo, the 1979 Iranian revolution oil crisis, and the energy price spike triggered by Russia’s 2022 invasion of Ukraine. Oil prices have surged past $125 per barrel, with analysts warning of further spikes if the Gulf mining threat materializes.
The Guardian reported that the first six days of the war alone cost the U.S. $12.7 billion, and the Pentagon is now seeking up to $200 billion in additional military funding. Qatar’s Ras Laffan — the world’s largest liquefied natural gas facility — may not fully reopen for five years, at an estimated cost of $20 billion annually.
Gulf Water Crisis: Power Strikes Could Cut Drinking Water to Millions
The escalating rhetoric around power grid strikes has raised a terrifying secondary threat: the collapse of Gulf desalination systems.
Gulf states consume roughly five times as much electricity per capita as Iran, and that power is what keeps their desert cities habitable. Desalination plants produce 100% of the drinking water in Bahrain and Qatar, more than 80% in the UAE, and 50% in Saudi Arabia. A sustained power grid attack on either side could leave tens of millions without clean water within days.
Iran initially threatened to strike desalination plants directly but appeared to walk that back Monday, with the IRGC stating: “The lying U.S. president has claimed that the Revolutionary Guards intends to attack the water desalination plants and cause hardship to the people of the countries in the region.” Instead, they affirmed a “like-for-like” retaliation doctrine focused on power infrastructure.
The U.N. High Commissioner for Human Rights, Volker Turk, warned that attacks on civilian infrastructure including power grids “do not meet the strict definition of military objectives, and amount to war crimes.”
Khamenei Reported ‘Injured, Isolated, and Not Responding’
In a significant intelligence development, the Washington Post reported Monday that Iranian Supreme Leader Mojtaba Khamenei is “injured, isolated, and not responding to messages directed to him.”
Mojtaba Khamenei assumed the role of supreme leader after his father, Ayatollah Ali Khamenei, was killed in the very first wave of U.S.-Israeli strikes on February 28. An Iranian official acknowledged earlier this month that the younger Khamenei was “lightly injured,” but he has not been seen in public since his appointment — raising serious questions about who is actually making decisions in Tehran’s war command.
Global Fallout: UK Emergency Meeting, NATO Support
The crisis is reverberating worldwide. Bloomberg reported Monday that UK Prime Minister Keir Starmer will chair an emergency meeting with top ministers and Bank of England Governor Andrew Bailey to address the economic fallout from the Iran war.
NATO Secretary General Mark Rutte outlined the alliance’s support for Operation Epic Fury over the weekend, while the USS Gerald R. Ford continued carrier flight operations in the CENTCOM area of responsibility. Communities across the United States held emotional tributes for fallen service members of the operation.
On the ground, Israeli military spokesperson Brigadier General Effie Defrin told reporters Israel expects “weeks more of fighting against Iran and Hezbollah.” Israel’s ongoing confrontation with Lebanon’s Hezbollah militia — backed by Iran — has seen Israeli forces raid multiple Hezbollah sites in southern Lebanon and destroy the Qasimiyah Bridge.
What Comes Next: The Critical Hours Ahead
All eyes are now on the countdown. Trump’s deadline expires tonight, and Iran has given every signal it will not comply. The scenarios are grim:
- If Trump strikes Iran’s power grid: Iran has promised to retaliate against Israeli and Gulf power infrastructure, potentially triggering the water desalination catastrophe experts fear. Mining the entire Gulf could choke off global energy supplies for months or years.
- If Trump backs down: The president faces a credibility crisis, having issued the most public ultimatum of any U.S. president since the Cuban Missile Crisis.
- If a back-channel deal emerges: Some analysts suggest indirect negotiations could produce a partial reopening, though no diplomatic channels appear active.
Admiral Cooper, leading U.S. military operations, has repeated his assessment that “Iran’s combat capability is on the steady decline as our offensive strikes ramp up” — but offered no timeline for how long the war would last, deferring that decision to President Trump.
What’s certain is that the next 12 hours will determine whether this already devastating conflict enters an entirely new — and potentially irreversible — phase of escalation.
This is a developing story. Check back for updates as the situation unfolds.