In an eruption, a discharge of lava and gases is produced by the volcano's chimney that can force nearby populations to move. The main cause of associated risk are lahars, that is, ash and sediment flows that fall down the slopes and usually cause a lack of drinking water and food .
The other great danger, sometimes fatal, are pyroclasts or tephra, solid fragments of magma and volcanic material expelled into the air through the eruptive column that sometimes reach temperatures of 1,200 ºC. It is what is called an incandescent avalanche , which causes traumatic injuries, burns and damage to the eyes, as well as respiratory poisoning from inhaling gases and ashes, especially in people with asthma or emphysema.
