Fear and stress are evident in my sister's voice in Tehran, despite the crackling, intermittent WhatsApp connection that - miraculously - still works from time to time.
Clarity is what she wants from me, knowing I am a journalist with the BBC in London.
"What is going to happen? What should we do?" she asks. US President Donald Trump has said people in Tehran should evacuate. "Is he serious?"
Since Thursday night, Tehran has come under repeated bombardment by Israeli planes, which seem to be flying freely across the skies of the capital. They are met by anti-aircraft fire – which is mostly ineffective.
From her window on the upper floors of a high-rise building, my sister can clearly see the action, which does little to calm her nerves.
