The recent wet season has seen a number of trees toppling over and some with tragic results. I believe that one reason contributing to this mishap is over pruning. More estate work is given out to contractors (many of whom employ unqualified or unskilled staff).
They over trim trees very badly (sometime leaving almost no leaves at all). I suspect laziness is the reason they do this so that they don't have to come back at regular intervals (perhaps HDB and NPARKS would like to relook into this contractual condition about pruning maintenace).
When a large tree has no leaves, it is not possible to carry out photosynthesis and this deprives the tree of nourishment and hence weakens it. The weaken trees with strong winds and heavy rain is a disaster waiting to happen. At good example of one rain tree (Samanea saman) at Changi Village.
I have written to both the HDB and NPARKS about this.
If you see any tree that over trimmed or in danger of falling please email the following: