What caused the boscastle floods? what factors increased the flood risk?

Heavy localised rainfall - 89 mm of rain fell in an hour. Saturated ground from previous rainfall. Topography of the land. The landscape upstream of Boscastle, a steep-sided valley, acted as a funnel directing vast volumes of water into the village.

Flooding

heavy rainfall.

long periods of rain.

snowmelt.

steep slopes.

impermeable rock (doesn't allow water through)

very wet, saturated soils.

compacted or dry soil.

Explanation:

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.

landlessness of ordinary people

^^something like that^^^