The Environment Agency has expanded its flood warning service across Cheadle, Stockport and the Platt Bridge area of Wigan.
The new flood warnings will cover almost 800 homes and businesses, issuing a warning message when flooding is forecast and again to warn users if impacts are likely.
There are three types of warning: Flood Alert, Flood Warning and Severe Flood Warning.
Residents can sign up for the service for free and can receive notifications via phone call, text or email.