>> parts of california are sinking and the signs are everywhere. you need to know where to look. >> this site is compacting while we are standing here. since the 30s, early 30s, about ten feet. >> we should stand at least my body height on top of me. that's where we could have been in the 30s. >> yeah. >> that's the gradual sinking of an area of land as a drought continues to grip the state, many have turned to underground water to fill in the gaps. now 60% of the state's water is being pumped out of the ground and mainly for agricultural needs. without that cushion of water, the ground is collapsing down to where the water once was. this is happening because of