Can people predict that black holes are coming?

Answer 1

If a rogue black hole were headed towards Earth, astute astronomical observation - such as those scanning for near earth objects, like asteroids - could notice gravitational lensing effects of the black hole due to its ability to bend light; perterbations of orbits of objects in the solar system might be noticed, or possibly electromagnetic emissions such as those around x-ray energies caused by its accretion disk could be detected.

There have been some efforts to statistically predict the probability that a black hole might encounter earth, results indicate the event to be extremely unlikely although not entirely impossible.

Answer 2

While scientists can predict the existence and behavior of black holes based on theoretical models and observations, it is not possible for individuals to predict when or where a black hole might form. Black holes are typically remnants of massive stars that have exhausted their nuclear fuel, collapsed under their own gravity, and they are typically found in regions of space where other massive objects are present.