Not Icelandic, but I’ve been following the situation closely.

This is an evolving issue. Grindavik, the town on the far side of this has been severely damaged by earthquakes and is currently surrounded by a berm that’s (mostly) holding the lava flow back. The Svartsengi power plant is likewise protected by a berm and has had the pipes supplying hot water to Reikiavik damaged and repaired.

Geologist Sean Willsey has been providing outstanding coverage on the subject.