Thanks, those two articles show why the 10 Essentials should include both visual and audible signaling gear. Visual signaling under a canopy in heavy rain should include the road flares mentioned because of their heat signature — not LED road flares, the old ones that put out a lot of heat. Starting a fire in a basin during a pineapple express would still be a challenge. The “sound sweeping” referenced shows why a good whistle should be included with any Essentials kit.

Here in SOCAL I’d still go with LED road flare, but we have a higher fire danger here. In a basin during a heavy downpour, starting an accidental wildfire would be highly unlikely.