warning bells start to ring

warning bells start to ring

Some issue indicates that one should be concerned about a potentially greater problem or troubling situation. warning bells started to ring among the board members when sales continued to decline for the second straight If your date asks you to meet in a secluded place, warning bells should start to ring.
See also: bell, ring, start, warning
References in periodicals archive ?
If I meet a man and he says this in the early stages of our relationship, the warning bells start to ring and he's dumped.