According to local experts, (mbl.is and Grapevine.is reports) the main problems are likely be lava movement in fissures away from houses, and a release of fumes ... so no immediate danger to aviation nor to KEF ... there's now a webcam of Keilir up and running
(https://www.livefromiceland.is/webcams/keilir/) ... after a considerable local earthquake swarm in the Reykjanes peninsula that has been ongoing for the past few days. The webcam shows both a visual image and another thermal image. Impressive, and for the moment, all is quiet.