-- Rural Hawaii residents are keeping a nervous eye on a lava flow that may reach their community within a week.
As the lava flow crept closer to residential areas Thursday, Hawaii County Mayor Billy Kenoi declared a state of emergency.
Video released by the United States Geological Survey Thursday showed the lava spreading through a forest, creating thick plumes of smoke.
Authorities said it’s difficult to predict a lava flow’s path because of changes in topography and lava volume, as well as where and how lava enters or exits ground cracks.
The Associated Press contributed to this report.