Why is pi's house overheated and overstocked?

I believe tis house actually belongs to Pi's teacher. It's a place in which Pi finds refuge.

He's an excellent cook. His overheated house is always smelling of something delicious. His spice rack looks like an apothecary's shop. When he opens his refrigerator or his cupboards, there are many brand names I don't recognize; in fact, I can't even tell what language they're in. We are in India. But he handles Western dishes equally well. He makes me the most zesty yet subtle macaroni and cheese I've ever had. And his vegetarian tacos would be the envy of all Mexico.

I notice something else: his cupboards are jam-packed. Behind every door, on every shelf, stand mountains of neatly stacked cans and packages. A reserve of food to last the siege of Leningrad.