July 8 (UPI) -- The number of people known to be missing in Central Texas flooding last week has risen dramatically to 173 people, Governor Greg Abbott revealed Tuesday.

The vast majority of those unaccounted for -- 161 -- were missing from Kerr County, while 12 people were missing from other counties. Kerr County was hardest hit by the flash flooding early Friday, which overwhelmed the Guadalupe River, a popular recreation site in the region.

There have been 108 confirmed deaths in the flooding, including 27 campers and counselors from Camp Mystic. Abbott said five campers and one counselor were among those listed as missing.

"There are far more fatalities than there were in Hurricane Harvey. That's how catastrophic this is," Abbott said during a news conference in Hunt.

More than 100 people died in the 2017 hurricane that impacted Texas, Louisiana and the Caribbean.