Authorities in Scotland have canceled trains and closed parks as a rare summer storm brings destructive winds to northern Britain.

The U.K.’s Meteorological Office on Monday issued an “amber” wind warning in Scotland for Storm Floris, meaning there is a potential risk to lives and property, especially from large waves in coastal areas. Network Rail Scotland said wind gusts of up to 90 m.p.h. (145 km/h) had felled trees across lines and damaged overhead wires.

An amber storm warning, covering much of mainland Scotland and the western islands, is now in force until 22:00.