Tripura, Mizoram, Manipur, as well as Chin State in Myanmar, have a huge rat problem every N years, related to a bamboo species flowering and fruiting. Extra food, they breed more, flowers/fruits gone, they starve, they raid granaries, fields, houses, etc., people die of famine.

Edit: corrected Assam to other nearby state names, based on:

https://en.m.wikipedia.org/wiki/Mautam