Damage to critical infrastructure and the arrival of more heavy rains complicated efforts Sunday to assist Kentucky residents affected by the recent massive flooding...Damage to critical infrastructure and the arrival of more heavy rains complicated efforts Sunday to assist Kentucky residents affected by recent massive flooding, Gov. Andy Beshear said.As Appalachian residents tried to rebuild their lives, flash flood warnings were issued in at least eight eastern Appalachian counties.The National Weather Service said radar indicated up to 4 inches (10.2 centimeters) of rain would fall by Sunday in some areas, and more rain was possible.Beshear reported that the death toll related to last week's storms rose to 28 on Sunday, a number he expects to rise significantly, noting that it could take weeks to locate all the victims.Search and rescue operations continued in the early hours of Sunday and 37 people were reported missing, according to the daily report from the Federal Emergency Management Agency (FEMA).There are a dozen shelters open for flood victims in Kentucky, with 388 occupants.Gen. Daniel Hokanson, director of the National Guard Bureau, told The Associated Press that National Guard helicopters have rescued about 400 people.He estimated that the guard has saved about 20 people with the help of boats to reach areas of difficult access.At a news conference in Knott County, Beshear praised the quick arrival of FEMA trucks but listed a number of challenges.We have dozens of broken bridges, which makes it hard to reach people and get people water, he added.We have entire water systems out of operation, and we are working hard to repair them."Beshear indicated that it will remain difficult, even in a week, to have an accurate number of the people who have been found.The governor also spoke of the generosity he has seen among Kentucky residents affected by the flooding.Many people who have lost everything but aren't even accepting products for themselves are passing them on to other people in their neighborhoods, making sure their neighbors are okay, Beshear said.Among the survival stories that continue to surface, a 17-year-old whose Whitesburg home was completely flooded Thursday put her dog in a plastic container and swam more than 70 yards to safety in a neighbor's roof.Chloe Adams waited for hours for dawn before a relative arrived to rescue her in a kayak, first taking her dog, Sandy, and then the teenager.My daughter is safe and sound tonight, her father, Terry Adams, said on Facebook.Today we lost everything... everything except the most important thing.Raby reported from Charleston, West Virginia.Associated Press writer Kevin McGill in New Orleans contributed to this report.Any reproduction without the written permission of the company is prohibited for the purposes of article 32.1, second paragraph, of the Law on Intellectual Property.Likewise, for the purposes established in article 33.1 of the Intellectual Property Law, the company records the corresponding reservation of rights, by itself and through its editors or authors.