The Met Service has issued a Flash Flood Warning for low-lying and flood-prone areas of all parishes effective until 5pm today.
A Flash Flood Warning means flooding has been reported or will occur shortly.
The Met Service says a broad trough across the central Caribbean has been producing a large area of unstable weather across the region including Jamaica since Monday.
This system is expected to remain across the area for the rest of the week while bringing increased rainfall to the island.
Observations indicate that light to moderate and occasionally heavy showers and thunderstorms have been affecting sections of most parishes, especially eastern and central parishes over the last several hours.
The forecast is for periods of showers and thunderstorms to continue affecting sections of most parishes through to tomorrow, with most of the activities across central and eastern parishes.
Additionally, Fishers and other Marine interests should exercise caution as sea conditions will deteriorate due to thunderstorms and strong gusty winds.
Motorists and pedestrians should not attempt to cross flooded roadways or other low-lying areas as strong currents are likely.
Residents in low-lying areas should be on the alert for rising waters and be ready to move quickly to higher ground.