A technological solution based on IoT and LoRaWAN connectivity for continuous health monitoring of isolated workers in high-risk industrial environments is presented. The system was implemented in a real environment within a nationally recognized steel plant. It uses industrial-grade smartwatches to measure and transmit key vital signs in real-time, enabling both automatic and manual alerts in critical situations. The architecture was validated through coverage and interference testing, demonstrating how emerging technologies can improve worker safety, strengthen protection perception, and optimize emergency response capability in complex operational scenarios. This work complements a previous research line oriented toward the design and validation of a proprietary embedded system for physiological monitoring of operators. Unlike that development, this work evaluates the implementation of a commercial solution in a real environment, focusing on network coverage, operational robustness, and response mechanisms for critical events.