https://phys.org/news/2018-06-guatemala-volcano-weather-danger-halt.html

Troublesome rain and more volcanic activity had been hindering search searches, but when teams have been able to work in the hardest hit areas, the death toll has continued to rise.

Efforts were cut short again Wednesday when a downpour forced teams to retreat for fear of mudslides. Boiling water flowing down the volcano's slopes from dangerously hot volcanic gas and ash also posed a threat. A day earlier, flows of super-heated volcanic material forced crews to pull back.