TT organisers have announced another, two-hour delay to today's planned race schedule.
They say no more rain is forecast before 8pm tonight, Saturday, June 6 - but conditions on the course will need to improve 'sufficiently' before racing can go ahead.
The Mountain Road is currently closed because of pressure on emergency services.
Meanwhile, all roads around the TT course are expected to shut at 3pm.
Officials add a further update will follow at 2pm.
£10k raised by popular charity walk
Mountain closed because of pressure on emergency services
Douglas-based Taxi firm stops operating
Questions raised over government tender for hygiene inspections
Are too many buildings waiting to become protected?
Politician wants to know why hospital was being valued
New laws would mean less regulation for small charities
Several arrested for entering closed roads, including cyclists