Lewis said: “Over the Bank Holiday weekend, we have sadly seen the very real dangers of swimming in open water.
“We understand that with the warm weather many people could be tempted to take a dip in open water but there can be hidden currents and unseen dangers such as mud banks or items under the water that a swimmer can become caught on.
“Residents must be aware of the potential deadly consequences.
“Don’t be tempted to put your life at risk by cooling off in open water.”
Lewis also said he would like to remind those visiting Pickmere Lake to park “safely and responsibly”.
This comes after people living near the lake told BBC Radio Manchester they “could not get in or out” of their houses over the Bank Holiday weekend.
Lewis maintained emergency response had not been affected during this incident.
He added: “While inconsiderate parking did not hinder the emergency response on this occasion, in incidents such as this, emergency services require immediate access, and poorly parked vehicles could significantly delay our ability to respond.”
