Hawaii’s Mauna Loa, world’s largest active volcano, erupts for first time since 1984

Residents have been told to review emergency plans after Hawaii's Mauna Loa volcano began erupting Sunday night for the first time in 38 years.

Because of the threat of ash blowing downslope, the National Weather Service has issued an Ashfall Advisory on Hawaii's Big Island until 10 a.m. local time.

Officials said a quarter-inch of ash accumulation is possible, and people with respiratory problems should stay indoors or wear cloth masks to limit exposure to potentially dangerous particles.