East Sussex police have confirmed they are investigating the incident.
The public is being warned to avoid the area between Eastbourne and Birling Gap due to a "potential environmental issue" while nearby roads have been closed.
Up to 50 people have complained of breathing difficulties following a suspected "chlorine gas" leak at Beachy Head this afternoon.
'It was definitely out of the ordinary considering it was a nice clear sunny day 10 minutes beforehand.
"While the nature of the gas hasn't been established, East Sussex Fire and Rescue Service has advised that it is "extremely unlikely" that it was chlorine, as was being suggested on social media", a Sussex Police statement said Monday.
Enjoying the bank holiday weekend at the beach at Berling gap with his family, contributed 2 experienced statements to BBC.
Authorities said the problems began when the "unknown haze" covered the area after possibly coming in off the sea at about 5 p.m. local time.
Sameer Jadhav said on Twitter: 'Birling Gap some weird gas leak.
It was first reported in Birling Gap, between Eastbourne and Seaford. Work is continuing to find the cause, as Malcolm Shaw reports.
'The situation will continue to be monitored, but it is believed that this was an isolated incident and is not expected to recur'.
A police spokesman said: "With the assistance of HM Coastguard and the RNLI, emergency services personnel were able to collect the vehicle where the driver was sadly found to be deceased".
There's a handsome castle, elegant-looking people, seems like they're planning to celebrate something, and...wait, what is it?