The following video, provided by WFTS, shows a home destroyed by the sinkhole.
Firefighters arrived at the residence to discover a hole about the size of a swimming pool.
He says it was "frightening" to watch the home disappear into the hole. No one was home at the time and Pasco County Fire Rescue authorities did enter the home to retrieve two dogs and some belongings.
Authorities said a sinkhole opened on the same property five years ago.
After the home collapsed, the only thing that was visible was it's roof and a side wall. No one was home at the time, the owners had already gone to work. Within minutes, he said, "the hole opened up". "This is something we've never seen before", he said.
A sinkhole had previously been fixed at the location, WFLA said.
The hole quickly grew to 200 feet wide - about two-thirds the length of a football field - and 50 feet deep.
Power has been shut off to about 100 homes as a precaution.
The Red Cross will be assisting evacuated residents.
As of 8:23 a.m., the depression has expanded and has reached the roadway. The home last sold in 2015, according to records.