‘A hundred feet above the roof of the mesa, they hung like the twisted pillows of a sleepless giant. Columns of turbulent air moved within the clouds, boiling upwards to the anvil heads like liquid in a cauldron. These were not the placid, fair-weather cumulus of Coral D, but storm-nimbus, unstable masses of overheated air that could catch an aircraft and lift it a thousand feet in a few seconds. Here and there the clouds were rimmed with dark bands, their towers crossed by valleys and ravines. They moved across the villa, concealed from the lakeside heat by the haze overhead, then dissolved in a series of violent shifts in the disordered air.’
from ‘The Cloud-Sculptors of Coral D’, J.G. Ballard
Absence Club 