Roads in the area were closed off by Medway Council while emergency teams dealt with the blaze
Many residents were sent to the Village Institute in Hoo, where an emergency rest centre was set up.
Chris Hosegood said the fire had been intense.
"As we walked up Vicarage Lane we looked back and saw the black smoke and all of a sudden the big fireballs.
"We could feel the heat half way up the lane," she said.
At 18:30 BST three fire engines were still at the scene, with firefighters saying they would remain for another one or two days.
Most residents have been allowed to return home.