The buzz of propellers can be heard over flooded Colorado Wednesday as 21 helicopters take advantage of the clear skies to fan out over the mountainsides, looking for those still need help.
Members of FEMA's Swiftwater/Flood Search and Rescue Team have been in action, going door to door in search of survivors.
Although the rain has stopped, emergency workers are still warning people in the region not venture into rapid water. Many homes still have water surrounding them and have been cut off from roads and essential services.
"There's about a thousand residents that are up in the various isolated areas in need of evacuation," Nick Christensen with the Larimer County Sheriff's Office said.
So far, more than 11,000 people have been evacuated and about 19,000 homes damaged or destroyed.
"We basically had a waterway through our house," one resident said.
Meanwhile, many of Colorado's flood survivors are turning their attention to the long process of cleanup and rebuilding. And local churches in Boulder County are banding together to help.
***You can find out more what you can do to help with relief efforts by visiting Operation Blessing's website.
Church members are doing everything from cleaning the uniforms of the National Guard crews to cleaning out damaged homes.
"It's not even the fact that we're even making a huge dent in shoveling mud out of somebody's basement. It's just that they're not doing it alone," Pastor Matt Patrick told CBN News.
"They feel loved," he continued. "They know that these churches aren't here just to use and abuse there city, but they're here to serve their city."
Another pastor, Ramin Razavi, said, "If we want our light to shine the brightest, it's not about somehow amplifying our spiritual wattage, but it's about taking the light of God that we have to darker places."
"These kind of tragedies present that unique opportunity for us as the Church, as the body of Christ, to carry God's light to the places that are in the most need," he said.
CBN's Operation Blessing is working with the churches. Crews are providing much-needed cleanup supplies as well as prescriptions, diapers and baby formula.
"You guys have been in so many different situations and disasters and this is our first round so we are so thankful for the wisdom that would come from Operation Blessing and organizations like yours that would bring relief," Michelle Holmberg, with Young Life, said.
Volunteers are also offering emotional and spiritual support through prayer.