I was recently backpacking in Olympic National Park. I didn't have a tarp with me (was being cheap. Bought one shortly after the trip) but had a $5 umbrella. It rained a bit during one the mornings and I was cooking under my umbrella (the main reason I brought it) to protect the stove from getting wet. One thing that occurred to me as I was cooking is the umbrella was probably collecting some of the gases from the stove. Once in a while I kinda tilted the umbrella a bit to "let the gas out" from underneath.
My question: Do I risk suffocation while cooking under an umbrella?
I've thought about it more since my trip and am inclined to think no. I feel as though there is enough airflow under the umbrella and so as long as I am not sticking my head up to the very tippy top of the umbrella to breath I am fine. But curious to hear the thoughts of others.