Well the world’s worst tree for dropping huge limbs or falling over is the coral tree – usually called Erythrina indica. This is a weed tree spread by humans: almost any part of this tree will grow into a new tree: broken branches, bits of bark even mulch and wood chips from mulched coral trees will grow.
Recently our electricity and phone lines were cut off for a couple of days due to a coral tree on another near-by property falling on the power lines. If you have a coral tree, get permission to remove it & tell them not to mulch it!
Most trees that drop branches are weakened due to lack of water. Use a sprinkler for 1 hour once a week during summer on ALL trees near houses, power lines or roads. This pays dividends.
Hooroo!