Major decline in number of mice in homes during monsoon

It appears that the mice and rats are invading homes of people in panaji, goa mainly during spring and summer when the plants outside are drying up
It appears that they do not get any food outdoors during summer, so they are forced to enter the flats of people.
During monsoon there are many edible plants growing in the wild
So the mice are not entering the homes of people living in flats to eat food, cockroaches and other items.
One or more cats may have also contributed to the decline in the mice population.