What do you think is the good effect of praying for a place which is in the state calamity? Like the Paris attack, it was prevalent in the social media items that say "let us pray for Paris." Do you think that God will do something because we are all praying for Paris? And what are we praying for Paris? The damage has been done and lost lives cannot be regained.
My point in this post is the prayer should have a specific intention and should be realistic and clear. When you pray to win the lotto jackpot, do you think it is a good intention? For all we know, all those who bet on the lotto are also praying. In that case, the intention is specific but not realistic.