When they emerged, the forest was a smoking skeleton. But the river had saved the outcrop and the meadow beyond. Rust shook the water from his fur. The russet female touched her nose to his. Around them, the other squirrels began, cautiously, to dig for wet tubers and unburned acorns.

He leaped onto a sun-bleached stump and began a warning call—not the angry chrrr of a predator, but a sharp, staccato kik-kik-kik! that cracked through the smoky air. He turned and bolted down the streambed, then stopped, looked back, and called again.

But Rust did not run. He had seen the deer bolt and the birds flee. He had seen the panicked scattering of his own kind—siblings and cousins chittering, stuffing their cheeks with last-minute stores. They did not understand. This was not a storm or a fox. This was the mountain waking up.

He reached the muddy bank and dove into a shallow pool choked with ash. One by one, the other squirrels tumbled in after him, plunging into the water until only their noses showed. Above, the world burned. The roar was now a continuous thunder. Oaks that had stood for two hundred years burst like torches.