 Harrison Lake was implicated in the deaths of three people in 2015, and five total since 2008.There is an initiative underway to post warning signs about the lake's colder water that can impose a hypothermic risk to swimmers who attempt swimming far distances away from the safety of the shore as well as shock, swelling of lungs, and drowning.The main waterflow coming into the lake is the Lillooet River, where there is a small bay named Little Harrison Lake.