Astronomers discovered the asteroid 2024 YR4 in December 2024, with a potential collision date of December 22, 2032.Initially, the chance of impact was 1%, now at 3.1%, the highest ever recorded for a dangerous asteroid.The potential consequences of the 'city-killer' asteroid include wiping out an entire city with energy equal to 8 megatons of TNT.Efforts to monitor the asteroid's orbit have raised the impact probability, with NASA at 3.1% and ESA at 2.8%.YR4 falls into the 'city killer' category, with the potential to devastate cities like Mumbai, Bogota, or Lagos.NASA and ESA are using advanced telescopes to monitor 2024 YR4 and assess its size and trajectory.Experts believe the collision odds will drop below 1% by April 2025, and agencies are prepared with deflection measures if needed.Although the risk is low, continuous monitoring of 2024 YR4 is crucial due to potential significant consequences.Recent notable asteroid impacts include the Siberia Fireball, Philippines Fireball, and Berlin Meteor in 2024.Continuous monitoring and early detection of near-Earth objects are essential to assess threats and understand asteroid impacts.