Water flowing down southern flank of Mount Nyamuragira , park officials report . Nyamuragira is in Virunga National Park . Kenya 's mountain gorillas not in danger , but lava threaten their habitat .
Lava flowing down southern flank of Mount Nyamuragira , park rangers report . Nyamuragira is in Virunga National Park . Park 's mountain gorillas not in danger , but lava threaten chimp habitat .