noflynomore : reading the small report helps, they were not fire fighting but returning to the airport :
Location: 22.00 Nautical miles SE From SCEL - Arturo Merino BenítezInternational Airport - Santiago de Chile. [...] As the aircraft was returning after a water drop,
I do not know the rules in Chile , but in Europe , it would 500 ft minimum. hence the Drone regulation. We have had recently in the UK an airprox filed by a drone owner , when an helicopter came at 100-200ft right above where he was working ( legally) .
Remember a drone owner do not want his expensive toy to be destroyed either...