Icelandic authorities now say threats of wildfires have officials on "high" alert and that eruption fissures were bigger than scientists initially thought after Wednesday's eruption of the once-dorman

The North Atlantic island nation is on high alert after lava spewed across the Reykjanes Peninsula and smoke belched into the sky.

As magma stirs beneath the surface, a notorious Icelandic volcano threatens to awaken once more, sending ripples of fear through nearby towns and retreats.