Except when it's not. Flash droughts can happen in just weeks of intense dry, hot conditions and wipe out a crop.
Flash drought intensifies rapidly due to changes in precipitation, temperature, wind, and radiation. These changes in the weather increase evapotranspiration and lower soil moisture. Flash droughts can cause extensive damage to agriculture, economies, and ecosystems if they are not predicted and...
www.drought.gov
There's a myth that even many environmentalists seem to be buying into, which is that there will be climate change 'winners' and 'losers' and that we will still all be able to adapt to future warmth by simply moving away from coastal areas and into regions that are wetter and cooler.
This ignores the fact that these regions can still suffer extreme conditions that will make habitation and agriculture quite difficult. There's no way we're going to support a population of 9-10 billion with significantly less arable land and groundwater if our current breadbaskets become defunct.
We're likely headed for a mass starvation event in the very near future, and with it, a major humanitarian crisis, and probably political crisis in handling the relocation of millions and millions of climate refugees.