https://phys.org/news/2018-06-guatemala-rescuers-volcano-survivors.html

Rescue workers who had to call off their efforts overnight tried to put in a few final hours under intense pressure from families desperate to locate loved ones who are feared to have been buried and burned alive.

One rescuer who requested anonymity said the smoking ash and rubble was still 80 degrees Celsius (176 Fahrenheit) at just five centimeters (two inches) below the surface.