Wrong wile. Srrry.
How about this.
Pakistan and India have about 320 nuclear warheads between them.
Unlike the 1000s of the US and Russia, the choice of airburst and surface burst differs. The US and Russia would only rarely use surface burst (against hardened targets, and they likely already launched so maybe pass them by and airburst).
But the Pakistanis hate the Indians, and they are west of them. The wind predominant is west to east. So they will have no reluctance to surface burst their whole inventory and irradiate India, and pretty much the whole planet at that latitude.
Which includes Texas and the Houston refinery complex.
No fuel, no trucks, no food.