Original: The most affected city was Acapulco, Guerrero, where six people were killed by landslides, and where over 100 families had to be evacuated after the La Sabana River flooded.
Simplified: The city that had the most problems was Acapulco, Guerrero, where six people were killed by landslides, and where over 100 families had to leave after the La Sabana River flooded.