Please don't.
If you aren't already part of a coordinated & authorized group, please don't. A serious problem with any emergency is Enthusiastic Helpers & Do-Gooders Getting in the Way. These are people with good intentions but no knowledge of coordinated emergency procedures or protocols. Drones are also in this category.
Red Cross, FEMA, CAP, AngelFlight (all wings) and local governments have LOA/MOUs & agreed upon procedures to integrate with each other. They train and practice these procedures. Example - after 9/11, AngelFlight was activated on standby for blood transports within the US - activated but no one flights were ever performed. In the Gulf when the BP oil disaster happened, the 2013 floods in Colorado, and other disasters, local CAPs were activated for extensive photo shoots and location of stranded people.
Regardless of the somewhat hostile attitude towards CAP around here on POA, it really does serve a useful and cost-effective purpose. Let CAP do the boring up & down search patterns to find the lost airplane/hikers/whatever and pinpoint the location, so the professional SAR groups don't waste time looking everywhere.
Your best bet, unless a request goes to the general public, is donate blood and/or donate money.