▁and ▁once ▁at ▁ 0 0 0 0 ▁UTC . ▁ ▁An ▁un - aug ment ed ▁Autom ated ▁Sur face ▁We ather ▁Ob ser ving ▁System ▁( AS OS ) ▁is ▁also ▁position ed ▁at ▁the ▁air port ▁and ▁records ▁the ▁official ▁climate ▁data ▁for ▁Del ▁Rio . ▁The ▁National ▁We ather ▁Service ▁office ▁in ▁New ▁Braun f els , ▁Texas ▁is ▁responsible ▁for ▁the ▁forec ast ing ▁and ▁warning ▁of ▁weather ▁events ▁in ▁the ▁Del ▁Rio ▁area , ▁but ▁this ▁juris dict ional ▁boundary ▁does ▁not ▁extend ▁across ▁the ▁border ▁into ▁Mexico . ▁ ▁Dem ograph ics ▁ ▁As ▁of ▁the ▁census ▁of ▁ 2 0 0 0 , ▁ 3 3 , 8 6 7 ▁people , ▁ 1 0 , 7 7 8 ▁households , ▁and ▁ 8 , 5 1 4 ▁families ▁res ided ▁in ▁the ▁city . ▁The ▁population ▁density ▁was ▁ 2 , 1 9 4 . 0 ▁people ▁per ▁square ▁mile ▁( 8 4 6 . 9 / km ²). ▁The ▁ 1 1 , 8 9 5 ▁housing ▁units ▁aver aged ▁a ▁density ▁of ▁ 7 7 0 . 6 ▁per ▁square ▁mile ▁( 2 9 7 . 5 / km ²). ▁The ▁ra cial ▁make up ▁of ▁the ▁city ▁was ▁ 7 3 . 0 5 % ▁White , ▁ 7 . 2 1 % ▁African ▁American , ▁ 0 . 7 0 % ▁Native ▁American , ▁ 0 . 4 9 % ▁Asian , ▁ 0 . 0 6 % ▁Pacific ▁Island