Emergency crews responded to a fire at a condo complex in Guilford early Friday morning.
The fire broke out at 80 Seaview Terrace just before 3 a.m.
Several residents were able to escape the fire after being woken up by neighbors.
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"The only thing I could see was smoke in front of my face," Brian Scacciaferro said. "When I came outside, the whole entire top of the house was completely engulfed in flames."
Two people was taken to the hospital but do not appear to be seriously injured.
Fire officials said hydrants in the area didn't have the volume of water needed to fight the fire so a secondary source of water had to be brought in.
Branford, Madison and North Madison fire departments provided mutual aid.
The cause of the fire is under investigation.