The world's largest active volcano, Mauna Loa, erupted in Hawaii for the first time in 38 years.
The eruption started late on November 27, sending lava down one side of the volcano on Hawaii's Big Island. There has been no indication of a threat to nearby communities, but the lava flow is inching closer to the Daniel K. Inouye Highway, a major artery that connects two sides of this island.
State health officials have also warned that air quality could be worsened by hazards such as vog, or volcanic smog.