Whatever just won is washed off the reels, the symbols left behind drop down, and new ones tumble in from above. Each further win in that chain pays ×2, then ×3, then ×5.
Cloudbursts that pour wins down the reels
On a Cloudburst island a single spin may keep paying. All the symbols involved in a win are cleared away, the rest slide down their reels and fresh symbols rain in to close the gaps.
A win from the refill pays double, the one after that triple, and every win beyond that five times, with the chain ending as soon as a refill pays nothing. Cloudbursts keep falling during free spins too, multiplied on top of the feature.
Worked example. A first win of 4 Play Credits, then a cloudburst win of 3 and another of 2, adds up to 4 + 6 + 6 = 16 Play Credits for the round.