Around 200 millimeter of rain in two days in Monterrey, Mexico.
By the way, that is 1/3 of the yearly rain in Monterrey in just two days. That is a lot.
Source: https://weather.com/weather/tenday/l/Monterrey+Nuevo+León+Mexico?canonicalCityId=c641151b28f60389898f58aba529d9ec306c2ccb04ad699216c44ee7c172cc75
Photo: https://www.pexels.com/de-de/foto/stadt-landschaft-berg-tourismus-18983477/