Travel US-Canada, Mexico border closures extended into late August as American COVID-19 cases surge July 17, 2020July 17, 2020Curtis Tate, Jayme Deerwester and Morgan Hines, USA TODAYComments Off on US-Canada, Mexico border closures extended into late August as American COVID-19 cases surge The U.S-Canadian border closure is being extended a fourth time as COVID-19 rates surge in several American states.