He could hear her screaming.
He had heard screaming like that before, during the war. When the Ishvalans were being burned alive, that was how they screamed. A sound that ripped through his body as if his spine was being shattered. It was the sound of death. That was what he was hearing.

Roy called out her name. "Riza." He never called her that, but she needed to know she wasn't alone. She needed to know Roy was going to save her.
Everything was on fire. The buildings, the motor cars. Everything. He could barely see his own body through the thick smoke.
God, he had caused this. He had started these flames.

"Hawkeye!" He choked out, trying to make his voice rise above the deafening roar of the fire.
He couldn't find her unless she started screaming again. She had to start screaming again, at the very least to let him know she was still alive.
Covering his face with his sleeve, he ran through the rubble and flames blindly. If he stayed still he would never find her. His entire body was slick with sweat, and he felt like he would be the one catching fire any second. His tongue could barely function as he called out for her. He was all dried up inside.
Riza started screaming again, and before going after the sound Roy had to stop as violent shudders seized him. It was unbearable to hear that. Knowing she was in pain, dying, and not being able to do anything about it.
Damn it, he was supposed to protect her no matter what. If he lost her... if he lost her it would be worse than death. Without her, well, he would never make it.

He ran as fast as he could, following the piercing sound down the city street. The smoke was clear enough for them to see each other. She was lying on the ground, and when she saw Mustang, she suddenly went quiet. He ran towards her, and when he saw her clearly, all the air left his lungs.
"Lieutenant." He whispered, but then his throat closed.
Her skin was covered in huge blisters that were popping and leaving holes in her body. She was covered in blood and ashes. Even her beautiful blonde hair had turned crimson and black. A sound was rising from her throat. She was trying to tell him something.
"Don't say anything. I'll get you out of here, I promise," Roy said urgently.
"You. You did this." She groaned.
"What?"
"You did this to me, Colonel."
"I didn't," he stammered. "I-"
"You said you'd protect me."

xxx

Roy gasped for air, trying to fill his lungs and calm down. His entire body was rigid and bathed in sweat.
"Riza," He said out loud, just to remind himself she was alive. She was alive and it had only been a dream.
But he was shaking so much he couldn't control himself. Roy Mustang was terrified. He lost her. Even if it was in his dreams, he had lost her and he felt it.
He breathed in deeply and shut his eyes tightly. "She's alive."
He got out of bed, and became extremely aware of his soaked undershirt and boxers. Roy went to his phone and dialed her house number. Even though he had only called it twice, he knew it by heart.
He heard the dial tone once, twice, three, four times.
"Damn it."
He dialed again.
"Hello?" Hearing her voice was such a relief to him he couldn't believe it.
He could tell she wasn't very happy to have been woken up. Her tone was drowsy and slightly irritated.
"You're fine," Roy sighed.
"Colonel? Is something wrong?"
"No, I-, you're fine."
"Of course I am. Shouldn't I be?"
She paused, and her voice turned soft, "Did you have a nightmare?"
He hesitated, "Yes."
"Was I in it?"
"I killed you."
Roy was stunned when he heard her chuckle lightly. How could she laugh? Was she mocking him? He was about to protest when he heard her.
"That's ridiculous, Colonel. You would never do such a thing. You love me."
Riza hung up before he could answer.
"I love her?" He asked himself, but he knew it was a stupid question.