We had the same problem back in 2011 when floods in Thailand wiped out almost all of the world's hard drive manufacturing capacity across all manufacturers. It took almost two years for prices per GB to fall back to pre-flood levels.
Relying on only one country seemed as foolish then as it seems now, but we haven't learned the lesson yet.
i work on hydro electric power stations and often see drawings showing the 50, 100, 500, 1000 year flood water levels at some structure such as the powerhouse or intake. The civil engineers design the plant to withstand the 500 year flood. I've personally seen the 100 year flood level occur at about 7 different projects, and I only work on site at 1 project per year generally.
Relying on only one country seemed as foolish then as it seems now, but we haven't learned the lesson yet.