Today is the day of the summer solstice, so astronomical summer officially begins at 11:32 pm EDT (it’s June 21 in Great Britain). Remember that climatological summer began on June 1. We start the season with the passage of Tropical Depression Claudette, one of the earliest 3rd named storms of the year. According to Brian McNoldy, a hurricane specialist I follow on Twitter, it has happened in 2020, 2016, 2012, 1959, and 1887 as well. Today is the longest day of the year, so it is only downhill from here, although it will take a while before the changes are really noticeable. You can read more in EarthSky here.
