Great point! I don't know enough about drone tech to know how handy they are for SAR type activities but probably they're promising. The military drones have pretty advanced sensor suites (or at least that's my guess) and can likely use FLIR, etc to find people. Depending on the range I imagine drones could help a lot, especially as the technology gets cheaper. And as you say, just dropping water, food, blankets, etc could save a life.