Weather permitting, beginning at 9 a.m. Monday until complete, the water will be shut off to all customers on S. 21st Street from 12th Avenue South to 15th Avenue South. City crews will be replacing a fire hydrant. South 21st Street will be closed to through traffic from 12th Avenue South to 13th Avenue South. Detours will be posted. Motorists are asked to use alternate routes and use caution while driving in the construction area.