In similar situations, drones with thermal imaging cameras are easily identifying humans within a fire with its thermal imagery which helps the rescue teams not only realize that there are humans trapped but can also help in locking their exact locations. Thermal imaging with drones is also helping in rescue efforts during snow storms or avalanches, to name a few.
There are a number of search and rescue operations that actively use drones to aid their missions. SWARM is an international volunteer group which has a very strong batch of drones as well as operators who offer their help with drones in many rescue operations. Texas Equusearch is another organization working in Texas and the organization aids law enforcement forces whenever requested.