There was already a secular trend of Pakistan having to import ever-larger amounts of food[1].
Unfortunately the minute Putin invaded Ukraine, we saw one of the world's breadbaskets invade another of the world's breadbaskets and the West lost its mind with sanctions. The EU's reaction is "we'll do whatever it takes" which is a nice way of saying "we'll out-bid everyone else for food and energy". From that moment, most of Africa and many Asian countries were condemned by the West to face famines - just so Europe wouldn't face the total consequences of its own sanctions. Pakistan is one of the countries that will be out-bid by the EU.
Pakistan was already expected to raise imports before this flood[2]. I cannot imagine how bad it's going to be now that they have the confluence of terrible flooding and, Putin and the EU exporting famine to much of the world.
Everyone that can should consider donating to Pakistani aid.
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[1] https://www.dawn.com/news/1630378
[2] https://www.world-grain.com/articles/17140-pakistan-expected...