Examine the factors that contributed to the tragic house explosion in Lexington, focusing on the roles and responsibilities of the utility company, construction firm, and regulatory agencies. Highlight the importance of accurate gas line identification and adherence to safety protocols in preventing such incidents. Discuss the latest technologies and best practices for leak detection and emergency response in natural gas infrastructure. Consider the engineering challenges of maintaining older systems and the role of public awareness in enhancing community safety. Conclude by reflecting on lessons learned and the measures needed to ensure a safer future.