Jersey Fire and Rescue says emergency services have been delayed reaching a casualty on the beach because of cars parked on the slipway.
JRFS says there was an incident at the weekend where parked vehicles were in the way.
In a social media post, Station Commander Channing said: “This behaviour is putting people at risk. If we need to rescue people found unconscious in the sea, every second counts. If the emergency services cannot get to the casualty in good time, this life-threatening situation can become fatal.”
He's reminding people to leave enough space for large rescue vehicles to access and manoeuvre around the slipway.
Motorists should park according to the signs on the slip which tell you whether parking is allowed and on which side to park.

'Partnership Leads' appointed of new school grouping system
Businesses to get more money towards cost of training staff
Andium marks record year for new homes in Jersey
Princess Anne opens Jersey Zoo gorilla enclosure
Tarifa Jet and Caesarea Trader return to service
Jersey Post returns to profit
Could harnessing the youth vote change the election?
Inclusive island-wide fundraising challenge asks for 'moment of understanding'