Putting tree risk into perspective.
A neat and easy to understand relative risk came up in Tim Harford’s marvellous Cautionary Tales - The Spreadsheet of Life and Death. Driving for 200 miles (320km) has a risk of death of about one in a million (1 micromort).
We know the overall risk of death from branches or trees falling each year is less than one in a million (less than 1 micromort).
That means you’re exposing yourself to a higher risk of dying by travelling in a car on a 200 miles round trip to visit friends for the weekend, than you are being hit by a branch or tree over the whole of a year.