Blue Mountains City Council is assessing damage in the City after a one-in-50-year rainfall event.
Megalong Road, 500m past the intersection with Shipley Road at Blackheath, and Bells Line of Road at Mt Tomah were closed on Sunday (21 March) due to flood damage.
There continue to be significant delays on the Great Western Highway, and partial closures, between Hartley and Katoomba due to flash flooding at Blackheath. (Last updated at 2.30pm)
Blue Mountains Mayor Mark Greenhill said: "We have significant issues in Blue Mountains City, just over a year since we last experienced flooding. The extent of these issues is still to be determined. With rain predicted until at least mid-week, we will continue to assess damage and urge our residents to take care.
"Our hearts also go to the communities of Penrith and Hawkesbury who are experiencing major flooding.
"I have called the Mayors of Penrith and Hawkesbury today to tell them that our community stands with theirs. They have supported us during bushfires and we will support them as they grapple with this latest natural disaster."
The Bureau of Meteorology said major flooding was occurring along the Hawkesbury River at North Richmond, with heavy local rainfall upstream of Penrith causing river levels to rise sharply.
Due to the heavy rain the Great Western Highway and many other roads have been impacted. Please take care on the roads and visit https://www.livetraffic.com for updates on some of the conditions and road closures.
Follow Blue Mountains City Council's Facebook page at https://www.facebook.com/bluemountainscitycouncil for local road closures.
For emergency contacts and useful links go to https://www.bmcc.nsw.gov.au/emergencies-contacts-useful-links.
