Powershell Switch Statement to Set Multiple Variables

I am in the process of converting some old VB script to Powershell. I am trying to use a Switch statement to set multiple variables. Is this possible in Powershell? In VBS my code would look something like this:

Select Case ENV
    Case "DEV"
        : SRCDRV  = "\\Server1" _
        : DESTDRV = "\\Server1\Folder1\"

    Case "TEST"
        : SRCDRV  = "F:" _
        : DESTDRV = "\\Server1\Folder2\"

    Case "PROD"
        : SRCDRV  = "F:" _
        : DESTDRV = "\\Server2\Folder2\"
End Select

I have tried something similar in PS, but it doesn't seem to set the variables.

switch ($cENV) {
    DEV { 
        $SRCDRV = "\\Server1"
        $DSTDRV = "\\Server2\Folder1\"
        break     
    }
    TEST {
        $SRCDRV = "\\Server1"
        $DSTDRV = "\\Server2\Folder2\"
        break
     }
    PROD {
        $SRCDRV = "\\Server1"
        $DSTDRV = "\\Server2\Folder2\"
        break
     }
}

When I check the value of either DESTDRV or SRCDRV I get an error saying: The variable '$SRCDRV' cannot be retrieved because it has not been set. Any ideas on what I'm doing wrong?