Update – 9/20/2021
Lava and fire approach houses that have already been evacuated. There were no personal injuries, but some houses were damaged.
There are already 7 eruption sites.
700 people are evacuated in the area of Los Llanos de Aridane as a precaution because the lava could affect the main road.
Among the evacuees are also 500 tourists staying in the hotel in Puerto Naos.
The volcano emergency is now at level 2, level red.
UPDATE 2:28 PM EDT SUNDAY — UH OH!
From Geologists and Volcanologists:
The geometry of this fault system and the timing of its formation in relation to episodes of vent opening during the eruption indicate that it is not the surface expression of a dyke. Instead, it is interpreted as being the first surface rupture along a developing zone of deformation and seaward movement within the western flank of the Cumbre Vieja: the volcano is therefore considered to be at an incipient stage of flank instability. Climatic factors or strain weakening along the Cumbre Nueva collapse structure may account for the recent development of this instability.