Harlan stood, bracing against the howling wind. Sky still pink from the false sunrise, the vast plains awoke. Scanning positioning markers with his range finding goggles, he vectored his exact location. Just as the dim white crown of the first sun met the horizon the networks of warning sirens blared resounding in a marauding symphony with the screaming wind.
It was time to burn. His blood became hot with anticipation. His finger eagerly sought the trigger of his incinerary torch. He turned, leaning headfirst into the mighty wind, took aim and squeezed the trigger. Sweeping his laser torch in a wide band, a three kilometer trail ignited into flame. Fueled by the wind, the plains erupted into a tumultuous blaze.
Harlan ran to his chaser and sped off, fleeing the waves of fire.

Where is the main character standing and what is his goal? I feel kind of shoved into the whole situation and I can't seem to catch on...

That might work as a hook sometimes but for the first 13 it's a bit much.

warning sirens blared resounding in a maurading symphony with the screaming wind. – No way. This is very awkward phrasing with all the gerunds strung to together. It feels wrong even. “…resounding in a marauding symphony…” once again, this doesn’t raise any images or other feelings in my mind except confusion.

Why is he leaning INTO the wind to start the fire? That means – wouldn’t it – that the fire will blow back ON HIM? I take it to mean the wind is blowing ON him, not away from him.

That’s some torch to instantly set THREE KILOMETERS of whatever into flame!

Sorry, but this isn’t working for me on two levels – the words and structures you used to show this and the physical actions. Still, this is merely one person’s opinion.

I was curious about why he leans into the wind to start the fire, but not disbelieving. This gives me the impression he is some kind of thrill-seaker.

I totally missed the siren sentence on my first read through, that may need some work.

Also, I don't really like "his blood became hot with anticipation." I know "hot-blooded" means excitable, but do you really feel your blood heat up? It just stuck out to me.

That second sentence - Sky still pink from the false sunrise, the vast plains awoke - sounds like a thesis statement which would then be followed by a list of items proving/describing it. Actually the sky's pinkness would still be awkward. But how do the plains wake is the question. List the ways. However, I think that's not really how you meant to start this story.

I would just try this again and relax it a little bit. If this thirteen ended with the line about him getting an itchy trigger finger then that would be about the pacing I felt comfortable reading. I though the premise was really cool. A fire starter on another world, One with two suns and wicked wind. It makes me wonder why is he starting the fire. It seems that it is his vocation, by the way he carries himself and the type of equipment he employs makes it seem so. I can't help but think it is a "Prescribed" burn to either make uncontrollable fires less of a threat, but I really want it to be to destroy some kind of invasive fauna like poisonous swarms of insects. Either would be cool.