I't more like mud than lava. Anyway, it can be very dangerous. My family is from the north west of Arentina (Jujuy). In some areas there is a somewhat similar problem that is not caused by a volcano, just unusual heavy rains that create mud. We even call it "Volcán" (volcano).
There was a big disaster a few years ago [1], but smaller one are usual and they have to rebuild the roads and bridges from time to time.
This is definitely not “cold lava”, which isn’t a thing. It’s just mud from a lahar flow. When it is fresh and moving, it can be very destructive like a river of concrete.
There was a big disaster a few years ago [1], but smaller one are usual and they have to rebuild the roads and bridges from time to time.
[1] Some news coverage in Spanish https://www.jujuyalmomento.com/alud/siete-anos-la-tragedia-v...