Hurricane Nolo is expected to bring powerful winds and flash flooding to Hawaii, with heavy rain and strong winds forecast to cause flooding and extreme surf over the weekend. The storm was moving slowly south of Hawaii's Big Island on Saturday, with maximum sustained winds of 105 mph (165 kph). Its center was about 145 miles (235 kilometers) south of the southernmost point of Hawaii, and it could strengthen into a potentially life-threatening and catastrophic storm through the weekend. Forecasters warned of possible flooding and mudslides, with parts of the Big Island expected to see rainfall totals up to 20 inches (51 centimeters). Heavy rainfall was also expected on other Hawaiian islands. Michael Brennan, director of the National Hurricane Center, urged residents to avoid unnecessary travel due to dangerous conditions, noting that high winds could bring down trees and power lines. Residents on the Big Island are still recovering from Hurricane Lala, which earlier this year caused heavy rain and winds strong enough to lift around 100 homes off their foundations. In response to the approaching Hurricane Nolo, President Donald Trump approved an emergency declaration for Hawaii, authorizing the Federal Emergency Management Agency to coordinate assistance and provide funding for emergency measures. Hawaii officials advised residents to prepare emergency kits, and the governor activated hundreds of Hawaii National Guard members. On the Big Island, officials urged residents in flood-prone areas to consider sheltering in designated locations. Hawaiian Electric, the state’s primary utility company, said crews returning from restoring power in Kauai after Hurricane Lowell have been deployed to Oahu, Maui, and the Big Island in preparation for Nolo. Meanwhile, Hurricane Polo is heading toward Mexico’s Baja California peninsula after bringing storm conditions to the southwestern coast. On Saturday, Polo had maximum sustained winds of 155 mph (249 kph), but it is expected to gradually weaken before making landfall on Monday. One of the towns in Polo’s projected path is San Juanico, a small fishing community on Baja’s Pacific coast where access to basic needs is already limited. Gloriely Robles Meza, a manager at a local hotel, said the community feels left to prepare on its own for the storm. "We must prepare on our own — each of us protecting our homes and belongings," she said, adding that she wished authorities would preposition heavy machinery for clearing roads and emergency generators. For now, the only plan is to convert the local elementary school into a shelter. San Juanico has experienced late summer storms, but Polo feels different, said Jeffrey Westman, an American who owns property in the area. "During the last couple of years, the storms have felt big and strong and scary," he said. He is concerned about the town’s ability to receive food deliveries or reach larger grocery stores if road access is cut off. Washed-out roads could also block access to the closest medical facility, about 80 minutes away in Ciudad Constitución. Westman said he is hopeful Polo will lose intensity before reaching the Baja coastline, as past storms have often done. "A lot of times they do start petering out," as they approach, he said. "I’m hoping that’s the case."