People do change by meeting the Lord. And so does a community. When the people of a region gather together to pray and seek the Lord's will for their land, He will hear them.
"And shall God not avenge His own elect who cry out day and night to Him, though He bears long with them? I tell you that He will avenge them speedily. Nevertheless, when the Son of Man comes, will He really find faith on the earth?" - Luke 18:7-8