<prompt> Ngo-1935, inqubomgomo yokuphatha umlilo ye-US Forest Service yasungula ukuthi yonke imililo yasendle kufanele ivinjelwe yi-10 a.m. ekuseni ngemuva kokubonakala kokuqala. Amaqembu okucisha umlilo amiswa kuwo wonke umhlaba womphakathi, futhi ngokuvamile ahlanganiswe ngabafana abasebasha ngezikhathi zomlilo. Ngo-1940, abacimi bomlilo abaziwa ngokuthi ama-smokejumpers babeziphonsa ngezindiza ukuze bacime amalangabi ezindaweni ezikude. Ekuqaleni kweMpi Yezwe II, kwakhiwa izindlu zokubheka umlilo ezingaphezu kuka-8,000 e-United States. Yize abaningi behlehlisiwe ngenxa yokusetshenziswa okwandisiwe kwezindiza zezindiza, kusasetshenziswa abantu abathathu ekubhekaneni nomlilo unyaka nonyaka. Imizamo yokulwa nomlilo yase-Yellowstone yayiphumelele kakhulu, ngokushiswa kwezinkuni zasendle ngo-5,000 ekuseni ekuseni ekuseni ngemuva kokubonakala kwazo okokuqala. Ngesikhathi seMpi Yezwe II, abacwaningi babevame ukubona ukuthi ukusetshenziswa kwezinkuni zasendle kwakungaba usizo olukhulu ekuvimbeleni ukwanda kwemithili yemililo yasendle,  <response>: ukubuyisela ukulinganisela emvelweni 