The noise was suddenly enormous, the crashing and roaring of the buildings overlaid on the deeper rumble of the ground. There was a muddled stink, of gas, steam, ozone, soot.

The street, still shaking, was turning into a battlefield. The facings of the buildings were coming away and crashing to the pavements, sheets of stone and bright plastic and metal and glass, smashing and splintering as they fell, as if the street was imploding. Billboards and neon light tubes turned themselves into deadly missiles, showering shrapnel over the pavements below. Some of the older buildings seemed to be collapsing already, the breaking of their beams like gunshot cracks.

To the east, towards Arthur’s Seat, she could see red flames rolling and leaping, a growing pillar of black smoke. Sometimes the flames seemed to pause, to weaken, but then they would find new vigour and hurl themselves even higher than before. There was a constant muffled roar. It was like watching some immense oil refinery burning up.

She sat down in the middle of the road, keeping her hands away from the glass fragments skidding there. The road surface was cracking open — to her left, a great section of it was tilting up — but she seemed to be in a stable place, here, and far enough from the cracking facades of the buildings to survive that, with a little luck.

Hell, she thought. She might actually live through this. If she found somewhere to report in she would have a tale to tell…

But now there was a new explosion. A sound like a thousand cannon.

A wall of flame — taller than any of the buildings, laced with black smoke and steam — poured into the eastern end of Princes Street. It was almost beautiful, like a moving sculpture of smoke and fire and light. At the cloud’s touch buildings exploded like firecrackers, a blizzard of stone and metal and glass. Oh, shit.

Time turned to glue; she seemed to be able to make out every detail.

The flame hit the big old buildings at the end of the street. She saw the Register House’s portico and clock towers burst outwards, before fire erupted from within, white and hot, overwhelming the Wellington statue, the old Iron Duke on his horse, in the instant before the cloud enveloped them.

Now a fountain of flame and smoke erupted from the entrances to the Waverley Market, the underground mall built around the Station, and the panels of its roof fluttered into the air like so many leaves. A brilliant light enveloped the Scott Monument, two hundred feet of carved Gothic foolishness, magnificent in the flames” underlighting for one last instant, before it too erupted into shards of stone.

A wind buffeted her, blistering hot.