▁Republic , ▁officials ▁took ▁prepar ations ▁by ▁setting ▁up ▁relief ▁ag encies ▁and ▁setting ▁up ▁sh el ters . ▁Imp act ▁from ▁Ana ▁was ▁minimal , ▁mainly ▁consisting ▁of ▁light ▁to ▁moder ate ▁ra inf all . ▁In ▁Puerto ▁Rico , ▁up ▁to ▁ ▁of ▁rain ▁was ▁reported , ▁causing ▁street ▁flo oding ▁and ▁forcing ▁the ▁ev acu ation ▁of ▁three ▁schools . ▁ ▁Meteor ological ▁history ▁ ▁On ▁August   9 , ▁the ▁National ▁H urr icane ▁Center ▁( N HC ) ▁began ▁monitoring ▁a ▁tropical ▁wave ▁associated ▁with ▁a ▁small ▁area ▁of ▁con ve ct ive ▁activity ▁between ▁the ▁Cape ▁Ver de ▁Islands ▁and ▁the ▁western ▁coast ▁of ▁Africa . ▁The ▁system ▁eventually ▁spawn ed ▁an ▁area ▁of ▁low ▁pressure ▁as ▁it ▁track ed ▁towards ▁the ▁west . ▁After ▁slowly ▁organ ising ▁for ▁a ▁few ▁days , ▁the ▁N HC ▁reported ▁early ▁on ▁August ▁ 1 1 , ▁that ▁the ▁system ▁had ▁developed ▁into ▁a ▁tropical ▁de pression . ▁The ▁system ▁at ▁this ▁time ▁was ▁located ▁about ▁ 2 8 0   mi ▁( 4 5 5   km ), ▁west ▁of ▁the ▁Cape ▁Ver de ▁Islands . ▁The ▁de pression ▁developed ▁deep ▁con ve ction ▁around ▁the ▁center ▁of ▁circul ation ▁and ▁continued ▁to ▁track ▁generally ▁towards ▁the ▁west ▁in ▁response ▁to ▁a ▁mid - level ▁subt rop ical ▁r idge ▁to ▁the ▁north . ▁The ▁de pression ▁was ▁expected ▁to ▁gradually ▁intens ify ▁as ▁it ▁moved ▁over ▁margin ally ▁warm ▁sea ▁surface ▁temper atures ▁and ▁into ▁an ▁area ▁of