By Chuck Chiang and Nono Shen Evacuation orders and alerts due to a wildfire on Vancouver Island have been lifted and downgraded, but First Nations say they are still feeling the impact, warning that a propane-powered water-supply system could fail unless gas deliveries are restored. The Nuu-chah-nulth Tribal Council said the road linking the Huu-ay-aht and Ditidaht First Nations to Port Alberni had been cut by the Mount Underwood fire, and propane deliverers would not send trucks down an alternative forestry road. “Port Alberni is their main source for supplies and medical needs,” the council said in a statement. “The only other route out of their communities to Youbou is very rough and dangerous. Flat tires are a common occurrence. In fact, there were 17 flat tires reported in 24…