This post was last updated at 6 p.m. ET.
Helicopters were back in the air on Monday over the 15 counties across Colorado's Front Range where historic flooding has killed at least seven people, left hundreds more stranded and unaccounted for, and forced nearly 12,000 to evacuate their homes.
In a news conference, Colorado Gov. John Hickenlooper said 21 helicopters were conducting "search and rescue missions," and other teams were trying to assess the damage to transportation infrastructure.
Bad weather grounded the helicopters Sunday, leaving many people still waiting for help or to be evacuated, our colleagues at KUNC report.
According to KUNC:
"The number reported missing has fluctuated. As of Sunday afternoon the estimate was 1,253 — with most of those being in Larimer County. Many areas, like Estes Park, were without phone or cell service but have slowly been regaining contact, leading to rapid changes in the unaccounted for.
"Officials are slowly accounting for residents, as they cross reference names with Red Cross and shelter listings. 'So we have a master list that will get shorter — hopefully far, far shorter, and time goes by and we cross reference where each of those parties are,' said Nick Christenson with the Larimer County Sheriff's office.
"The death toll rose over the weekend. In addition to four previously announced fatalities in Colorado Springs, Jamestown, and Boulder, two women — one 60 and the other 80 — are both missing and presumed dead in the Cedar Grove area of the Big Thompson Canyon."
While the weather was good enough to get helicopters back into the sky, The Denver Post warns that "more rain is expected and dry, blue skies aren't likely until Wednesday or Thursday. 'It's a little bit drier, but we're definitely not out of the woods yet,' Todd Dankers, a forecaster with the National Weather Service, said Sunday."
According to the Los Angeles Times, about 1,500 buildings have been destroyed by flooding over the past week. Nearly 17,500 have been damaged, the Times adds. About 2,400 square miles of area have been affected.
Update at 6 p.m. ET. Farming And Fracking Take Hits:
The floods have put a damper on two industries, according to KUNC's Grace Hood, who reports from Greeley, Colorado:
"Agriculture fields have been flooded with water, damaging crops that haven't yet been harvested. Meantime, the oil- and gas-rich area is spotted with hydraulic fracturing rigs and equipment.
"Weld County Emergency Management Director Roy Rudisill says so far only one oil line has been compromised but no spilling into flood waters has been detected.
"Rudisill says oil and gas companies have prepared for the flooding, shutting off lines and equipment earlier in the week."
Update at 2:13 p.m. ET. A Challenge:
In a televised press conference, Colorado Gov. John Hickenlooper said the recovery effort would be "a challenge."
He said during an aerial tour he saw that small communities were essentially cut off from each other.
He said that 21 helicopters were in the air and 10 teams of the state's Department of Transportation were assessing the situation.