Wait and strike with the sword.

You hunch down and wait for what seems like an eternity. It takes all your willpower not to cough, the ash and dust still thick in your lungs.

Finally the orc approaches. You shift your foot slightly, to get a better stance for your lunge, but the orc hears you. "Huh...?" he mumbles, pacing slowly to your position. You hear him pull his shortsword out. "Who's there? Come out, I ain't gonna hurt ya... much..."

He's nearly on top of you. With all your strength and agility, you spin out from behind the rubble and stab with the sword, catching him perfectly in the throat. He bleeds, stumbling over immediately. He struggles, gurgling curses as you watch him bleed out.

Thinking quickly, you grab his fur skirt and pull it off. Most of the blood dripped between the wooden slats, thankfully, sparing the garment any hard-to-explain blood stains. You slip it on, tightening the belt as best you could. You ass and nethers were successfully covered, now you had to deal with your breasts. The only piece of cloth you could find was a badly burned strip of skirt that threatened to crumble if overstrained. The cloth barely covered your nipples, leaving much of your breasts hanging out, but it was better than going naked. You had to make do if you hoped to get to the nearest town by nightfall.

Hours pass. By some miracle, you make it to Riverwood with a few moment of daylight to spare.