HONOLULU (KHON2) — The Hawaiian Volcano Observatory confirmed that lava flows heading in the direction of a key transit route on Big Island have slowed down.

At first, officials predicted that the fastest time lava would reach Saddle Road would have been tomorrow. However, HVO said that the lava flow is now moving at a rate of 0.02 miles per hour.

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As a result, HVO predicts that earliest time the lava could reach Saddle Road would be within at least a week.

By around 6 a.m. on Thursday, Dec. 1, HVO said the front of the lava flow was 3.6 miles away from the road. Before slowing down, the advance rate of the lava was about one mile per hour the day before.

In addition, weather patterns have volcanic plumes moving to the south now meaning CO2 could potentially affect the south end of the Big Island.

According to the Department of Defense, siren testing that occurs at the first of every month will be happening today. Officials had considered postponing because of the eruption but since the volcanic activity is not affecting any communities the siren testing will happen as scheduled on 11:45 a.m.

The Hawaii County Civil Defense said old Saddle Road will be opened later on Thursday to help alleviate traffic on the main highway due to the influx of visitors and residents eager to see the historic moment in Hawaii.

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The agency explained that once they open the old Saddle Road, people will be able to more safely view the lava flow and park in the area. Assistants will be there to direct viewers.