A new lava flow on the Big Island has spurred Hawaii Gov. Neil Abercrombie to sign an emergency proclamation.

The lava, which is coming from vents that opened in June, is expected to reach the boundary of the Kaohe Homesteads as soon as Tuesday. If it continues to flow east-northeast, it will eventually cross Highway 130.

County officials have identified two abandoned roads — Railroad Avenue and Government Beach Road — to be improved and used as alternate routes should access be cut off by the lava flow.

The lava flow inches toward Kaohe Homesteads subdivision, a portion of which is seen at bottom right in this Sept. 3 photo.

Tim Orr/USGS

“Health officials are also advising all residents living near the lava flow to plan ahead for potential smoke from burning vegetation and low levels of sulfur dioxide,” Abercrombie said in a release Friday. “Conditions for nearby communities may vary widely due to the unpredictability of wind and weather.”

The disaster emergency relief period goes until Oct. 15, according to the proclamation.

Residents are also encouraged to enroll in local notification systems and monitor local radio and television broadcasts, the release says.

You can see more photos and track the flow’s progress on the USGS Hawaiian Volcano Observatory’s website here.

Read the emergency proclamation below.