1. A method for monitoring the health of a fleet of remotely-located machines, comprising: providing a health management computing system configured to monitor the health of the fleet of machines; receiving, at the health management computing system, temperature sensor data transmitted from at least one machine in the fleet, the temperature sensor data including one or more temperature sensor data points associated with a component of the at least one machine and collected by one or more temperature sensors aboard the at least one machine; receiving, at the health management computing system, thermal image data transmitted from the at least one machine, the thermal image data including one or more thermal images associated with the component of the at least one machine and collected by one or more thermal image sensors aboard the at least one machine; aligning, by the health management computing system, the thermal image data with the temperature sensor data; correlating, by the health management computing system, the aligned thermal image data based on the temperature sensor data; and generating, by the health management computing system, a notification when at least a portion of the correlated thermal data fails to maintain a determined relationship with respect to the temperature sensor data.