A central challenge of climate change, which Ghosh rightly points out, is that it resists our literary fiction that our ancestors found. As he states, it almost seems like in the field of literacy writing, climate change is well-nigh to extraterrestrials or interplanetary travel, thus it is ignored and shows a crisis of culture, and a failure of imagination. Ghosh says that in order to get past this, we need to be able to recognize, in which he asks the questions; how are we able to recognize different forms of disaster; from a freakish tornado in Delhi to sudden flash floods, hundred year storms, persistent droughts, and raging torrents pouring down from breached glacial lakes?
The whole point of this is that, In Exit West, Hamid's purpose was probably to also reinforce this idea that the unrealistic weather that is happening in our climate is actually real and probable-- which now pushes against what we thought was plausible. Instead of sticking to a narrowness typical story, he includes climate change as real and another reason why people are forced to migrate. This means that we are acknowledging our current climate, which we have not been doing for a while.