Walls of flames pushed by hurricane-force winds are devouring the Los Angeles basin, leveling whole neighborhoods and overwhelming firefighters. The water streaming from fire hydrants slows to a trickle. Ash rains down over the tens of thousands fleeing their homes, masked against the choking smoke. For Angelenos watching their city burn, there is no prior experience that can help them grasp the scale of what is happening. As a friend texted me from Hollywood, “This may be the biggest wildfire disaster in world history.