This paper presents a systematical analysis on the trends in the hourly-scale extreme precipitation in Beijing from 2000 to 2023 under the influence of urban heat islands and urbanization

based on the observation data of high-resolution precipitation

surface temperature

and impervious surface coverage. To achieve a comprehensive analysis

we use multiple statistical and spatial analysis methods－including trend testing

change point detection

L-moment analysis

cluster analysis

and space-time cube and emerging hot spot analysis. The results indicate a significant overall increase in extreme precipitation. The urbanizing process underwent a structural shift in 2011

leading to an elevated risk of extreme precipitation. High-value precipitation areas are primarily distributed in the city’s southwestern part

while the regions with strong variability and extreme intensity are concentrated in the transitional zones between the urban core and the western and northern mountainous areas. The spatiotemporal patterns of urban heat island are characterized by a stable core and active periphery

closely related to that of the extreme precipitation. Combination of ongoing urbanization and intensifying heat island effects has intensified hourly-scale extreme precipitation in Beijing

increasing spatial heterogeneity and complexity in associated risks.