What can we do to manage lava?

It isn’t possible to read the accounts and see the images of those affected and displaced by the lava flows, and not be moved. Judging by our comments and criticisms, we need to be angry with someone and at the same time understanding with someone else. Why did the state/county allow residential construction in such an unstable area? Why did the folks who built and bought there do so despite the extreme risks? Who is responsible for what, now? And what to do in the future?