Forest Health Protection Survey

At least 12 mil­lions trees have died in Cali­for­nia’s na­tion­al forests be­cause of four years of ex­treme drought. An aer­i­al sur­vey of se­lect areas in South­ern Cali­for­nia and the south Si­erra Nevada in early April showed that mil­lions of trees have died and were “most severely drought im­pacted,” said bio­lo­gist Jef­frey Moore, act­ing re­gion­al aer­i­al sur­vey pro­gram man­ager for the U.S. Forest Ser­vice.