Meteorologists say La Nina has arrived, bringing cooler weather patterns worldwide. This natural phenomenon often leads to a more intense Atlantic hurricane season. However, experts say this La Nina may be too weak to cause significant disruption. In the U.S., it typically means more precipitation in the north and dryness in the south. It also brings heavier rains to regions like Indonesia and parts of Africa. Despite conditions favoring hurricane activity, experts note this season has been quieter than expected. La Nina can be costly, with past events impacting U.S. agriculture significantly.