Authorities in Scotland canceled trains, closed parks and warned people to tie down backyard trampolines as a rare summer storm brought potentially destructive winds to northern Britain.

The UK’s Meteorological Office 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. The agency said wind gusts could reach 137 kmph,

A Scottish Government minister says it is “imperative” that people follow advice as Storm Floris begins to hit the country. Justice Secretary Angela Constance said Storm Floris is “well and truly with us” and warned Scots to expect disruption if travelling.