Charak Samhita
तत्र श्लोकाः- पूर्वरूपाणि सामान्या हेतवः सस्वलक्षणाः। देशोद्ध्वंसस्य भैषज्यं हेतूनां मूलमेव च ॥४९॥
[Summary] To sum up, premonitory signs and symptoms that precede destruction of communities, environmental factors that cause such calamities (along with their individual characteristics), remedial measures , sources of the destructive causes,
english translation