I've read that in Iceland they will actually stop the advance by spraying the leading edge with fire hoses.
I suspect that may work here: the Kilauea lava is some of the runniest there is. It is pouring down a tiny slope in the video. I imagine if you cooled the front bit enough to make it stop, the stuff behind would just come around the side.
Probably, as it approaches the houses, the lava is getting cooler, and it is coming closer to a water supply. Spraying water is probably a good thing to try on the last day before it arrives.
That is about the least exiting lava flow video I've ever watched. Reuters has some good footage on wsj; http://on.wsj.com/MkFLXa
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