Famine isn't gonna strike by now, but based on the difference on governance over every country there is possible chances of famine. During this lockdown there is change in climate, and this improves the development of agriculture. By now famine can happen only out of corruption.
Climate change is occurring for the last few decades. It didn't happened as a result of the lockdown. And impact of climate change is increasing with every passing year, as we are seeing droughts in certain parts of the world and floods in some other parts more frequently. No one really want to take care of the real reason behind it. Human population is at unsustainable levels, and it is still growing at a rate of 100 million per year. Unless the population growth slows down, famines and other natural disasters will continue to torment the globe.