KERRVILLE, Texas, July 8 (Reuters) - The death toll from the July Fourth flash flood that ravaged a swath of central Texas Hill Country rose on Tuesday to at least 109, many of them children, as search teams pressed on through mounds of mud-encrusted debris looking for scores of people still missing.

The grim undertaking has prompted questions about how first responders and rescue teams are able to mentally reckon with the work ahead.