Matsya Purana — Cosmic Architecture of Sun–Moon and the ‘Houses of the Gods’
वसन्ते चैव ग्रीष्मे च शनैः संतपते त्रिभिः वर्षासु च शरद्येवं चतुर्भिः संप्रवर्षति //
vasante caiva grīṣme ca śanaiḥ saṃtapate tribhiḥ varṣāsu ca śaradyevaṃ caturbhiḥ saṃpravarṣati //
In spring and in summer it gradually scorches for three months; and in the rainy season—and likewise in autumn—it pours down rain for four months.
It does not describe Pralaya directly; it outlines the orderly, cyclical functioning of time (ṛtu/seasonal rhythm), a sign of cosmic regulation that contrasts with the disorder of dissolution.
By mapping heat and rainfall to fixed seasonal spans, it supports planning for agriculture, taxation, storage, travel, and public works—core royal and household responsibilities tied to monsoon and harvest timing.
Seasonal knowledge guides Vastu and ritual scheduling: heavy construction, plastering, consecrations, and water-management works are typically aligned with dry vs. rainy months to avoid structural damage and ensure ritual readiness.