You are Vayu, you are the clouds, you are Agni, you are the lightning in the sky, you are the propellers of the clouds and therefore you are called the great clouds.
त्वमेव मेघस्त्वं वायुस्त्वमग्निर्विद्युतोऽम्बरे। त्वमभ्रगणविक्षेप्ता त्वामेवाहुर्महाधनम्॥