SAFETY CRITICAL APPLICATIONS:

SCATU PRODUCTS ARE NOT DESIGNED OR INTENDED TO BE FAIL-SAFE, OR FOR USE IN ANY APPLICATION REQUIRING FAIL-SAFE PERFORMANCE, SUCH AS LIFE-SUPPORT OR SAFETY DEVICES OR SYSTEMS, CLASS III MEDICAL DEVICES, NUCLEAR FACILITIES, OR ANY OTHER APPLICATIONS THAT COULD LEAD TO DEATH, PERSONAL INJURY OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (INDIVIDUALLY AND COLLECTIVELY, "CRITICAL APPLICATIONS").  CUSTOMER ASSUMES THE SOLE RISK AND LIABILITY OF ANY USE OF SCATU PRODUCTS IN CRITICAL APPLICATIONS, SUBJECT ONLY TO APPLICABLE LAWS AND REGULATIONS GOVERNING LIMITATIONS ON PRODUCT LIABILITY. 

In other words, use some common sense.  Cell phone technology is useful, helpful and may enable heroic actions, but there are many circumstances that can cause an SMS message not to be delivered.  Use it to supplement not replace safe practices.