Near the middle of the Yakama Reservation, Travis Hull lives with his kids and dog in a trailer. Two of his four kids have asthma.
Tyson, his middle son, has a particularly bad case.
"He'd go through coughing attacks that were just horrible," Hull said. "He had to be hospitalized a few times when he was a little person."
Hull said it was hard to see his son in an oxygen tent.
"And it's scaring him, so of course you're scared for him," Hull said. "And of course you're a parent. It hurts you to see them go through it."