Local media said several hospitals in the worst-hit areas of northern and central Kerala had reported an increase in the number of patients seeking treatment for snake bites.
The cheque will be handed over to Kerala Chief Minister Pinarayi Vijayan by employee representatives of Kalyan Jewellers in Thiruvananthapuram.
The proposed loan is part of a special package that the southern state, which estimates it has suffered damage of at least 200bn rupees.
The worst floods in a century in Kerala have killed hundreds of people, left dozens missing and about a million sheltering in temporary camps.
More than one million people have packed relief camps to escape devastating monsoon floods that have killed more than 410 people in India's southwestern state of Kerala, officials said Tuesday.
Dozens of people are missing and 1.2 million are sheltering in the camps, state officials said, as water receded and a huge clean-up gathered pace.
Authorities and military on Monday stepped up rescue and relief efforts in the flood-ravaged state of Kerala where an estimated 6,000 people remained stranded in the worst-hit areas.
Qatar Airways Cargo has announced its relief efforts to deliver urgent aid to Kerala following the devastating floods in the southern Indian state.
Rescuers waded into submerged villages in southern India on Sunday in a desperate search for survivors cut off for days by floods that have already killed more than 350 people.
His Highness the Amir Sheikh Tamim bin Hamad al-Thani issued a directive to allocate $5mn in aid of those affected by the floods that recently hit the southern Indian state of Kerala, to help provide shelter to those who lost their homes as a result of the humanitarian crisis.
Indian Prime Minister Narendra Modi promised the flood-ravaged state of Kerala more helicopters, boats and other equipment needed to evacuate tens of thousands of stranded people ...