MIAMI – A weakening Tropical Storm Oscar continues to slam parts of eastern Cuba with torrential rain and strong winds, leading to fears of life-threatening flooding and mudslides after the former hurricane made landfall Sunday evening, and now it has its sights set on the Bahamas yet again as it begins to move away from Cuba.Oscar made landfall near Baracoa in the Cuban province of Guantanamo just before 6 p.m. ET Sunday as a Category 1 hurricane with winds of 80 mph – its second landfall of that day.Earlier Sunday, Oscar made its first landfall on Great Inagua Island in the Bahamas – also as a Category 1 hurricane with winds of 80 mph.HOW TO WATCH FOX WEATHERThe small but mighty storm rapidly intensified from a tropical storm into an 85-mph hurricane on Saturday, causing islands in its potential path to issue watches and warnings ahead of the system’s arrival.As of the latest advisory from the National Hurricane Center (NHC), Tropical Storm Oscar had winds of 40 mph and was moving off to the north-northwest at 7 mph.The NHC said slow-moving Oscar is continuing to dump heavy rain across eastern Cuba, and that will likely continue through the first part of the week.Forecasters said that will lead to areas of significant, potentially life-threatening flash flooding along with the threat of mudslides in the region, especially in the Sierra Maestra mountains. However, the threats aren’t specific to Cuba. The NHC says areas of the southeastern Bahamas are also at risk of seeing flash flooding as the storm moves back through the region this week.Video from the region shows large waves crashing onshore while winds were whipping and rain was falling. And as Cuba endured the impacts from the storm, the nation’s infrastructure was struggling.According to a report from Reuters, Cuba’s electrical grid collapsed at least four times in two days, plunging the Caribbean island nation into darkness. According to the report, Cuba has been facing weeks of rolling blackouts ahead of then-Hurricane Oscar. And work to try and restore power was only slowed by the storm’s arrival.Tropical Storm Warnings remain in effect for portions of eastern Cuba and the central and southeastern Bahamas. The NHC says tropical storm conditions are expected in the warning areas of eastern Cuba through Monday night before those conditions shift to the warning areas in the central and southeastern Bahamas by Tuesday.WHAT TO DO WHEN HURRICANE OR TROPICAL STORM WATCHES AND WARNINGS ARE ISSUEDSome high rainfall totals are also expected across the region.The NHC says rainfall totals of 7-14 inches with isolated amounts of up to 20 inches are expected across eastern Cuba, especially in the higher elevations of the Sierra Maestra. Preliminary reports indicate more than 10 inches of rain has already fallen in the Province of Guantanamo.”This rainfall will lead to areas of significant, life-threatening flash flooding along with mudslides,” the NHC warned.In the southeastern Bahamas, rainfall totals of 3-5 inches are expected with isolated amounts of up to 8 inches that could also lead to flash flooding.The NHC says Tropical Storm Oscar will make a turn to the north-northeast Monday night. After that, Oscar is forecast to move at a faster speed toward the northeast on Tuesday and Wednesday.On that forecast track, the center of Tropical Storm Oscar is expected to emerge off the northern coast of Cuba, then move near the southeastern and central Bahamas on Tuesday.Oscar is one of the smallest cyclones on record in the Atlantic Basin, with hurricane-force winds (74-plus mph) only extending outward 5 miles from the center over the weekend, when it was still a hurricane.A Hurricane Hunter aircraft also determined the cyclone’s eye over the weekend was just more than 3 miles wide, making it one of the smallest features since Hurricane Wilma in 2005.Due to Oscar’s small size, fluctuations in intensity will be common, as the cyclone can take advantage of pockets of dry air and minimal wind shear.Oscar became the second storm to get a name on Saturday, joining Tropical Storm Nadine, which was christened early Saturday morning near Belize. Nadine later dissipated over southern Mexico on Sunday, but its remnants helped spawn Tropical Storm Kristy over the Eastern Pacific on Monday afternoon.