With floods come infectious diarrhoeal diseases

Those brown waters carry the potential for various infections, ranging from the mild, like conjunctivitis, to the potentially serious, like cholera and leptospirosis. — SS KANESAN/The Star

Infectious diseases of the gut can occur at any time, but in a flood situation, the number of cases can skyrocket.

If you have encountered flood water, you will notice its colour and smell.