DUBAI, United Arab Emirates — Zahra Arghavan and Mehdi Alishir stood on their balcony, watching the sun set over Tehran and bracing for the sound of airstrikes .
As time ticks down on U.S. President Donald Trump’s latest ultimatum , their thoughts were clouded by new fears: How long will the power be out if plants are bombed? How would they leave the city if the bridges are taken out?