Early in the morning, upon waking up, a heavy downpour was seen outside.
The dense vegetation allowed for a greater water retention capacity.
The evaporation effect of plants, much like that of the traditional evaporative coolers used in early industries, could change ground water into vapor.
Abundant vegetation could effectively increase air humidity, causing the rain to be particularly abundant.
This is what people used to call the tropical rainforest climate.
In the 31st century of this timeline, save for some areas with extreme climates, the vegetation in most areas is lush, looking all like tropical rainforests due to the inexplicably high oxygen concentration in the atmosphere.
While the rainfall was usually for an entire day, sometimes it would cause flash floods.
Harrison Clark had been here for ten days, six of which were rainy days with only four days of sunshine.
This was one of the significant reasons that interfered with his efficiency in excavating ruins.