Nic Lonsdale, duty watch manager at Portland Coastguard, said: "We are urging people to observe the warning signs and stay away from the edge." The cliffs at Durdle Door and Lulworth have been crumbling since the start of year.
In January, the steps to the famous landmark collapsed. Earlier this month, coastguards warned that the path was beginning to fall away.
More top news
A crack inside the glass pod of the i360 in Brighton has been fixed. The owners say there was no risk to safety and blame vandalism.
Thousands of students in the South have received their GCSE results. Grades are down in the South, as they are across the whole country.
Another warm day with a little more cloud and the chance of a few showers.