Hawaiian Electric urges customers to prepare for rains and winds impacting Oʻahu, Maui County and Hawaiʻi island on Friday and Saturday. During severe weather, strong winds can blow trees or debris into power lines, causing outages and damaging electrical equipment. Falling trees can hit utility poles or overhead lines, knocking lines down or causing poles to lean, which may result in outages, according to the company. Heavy rains can also lead to flooding of underground cables or other equipment.