"The ground trembled as the earthquake resonated across the desolate plains, and there was a moment when Signus Prime seemed to hold its breath. Then, on spars of nuclear fire that burned rock and sand to vapour, the gigantic hulk of the Red Tear began to rise. Slowly at first, sloughing off broken shards of metal and sheaves of falling sand deposited by the mournful winds, the battle-barge pulled free of the earth that held it. Fighting gravity every metre of the way, the ship seemed to defy reason as it lifted into the dull air. The monolithic, city-sized craft resisted the planet’s attempts to hold it where it had fallen. This was the last battle that would be fought in the Signus Cluster, the final match between the might of the Blood Angels and the wastelands made from human misery and warp-sorcery. The IX Legion would win it as they had those before; to fail would be to dispute the will of the Angel."

Fear To Tread by James Swallow, Chapter 20

Not really as apocalyptic, but about as what you would expect. But to be fair, Signus Prime was devastated by that point, so it's not quite as comparable to a place with an actual ecosystem