late summer heat; lingering summer heat
blistering heat; "major heat" solar term (approx. July 23)
height of summer; high summer; hottest part of the summer
intense heat; severe heat
hot and cold; summer and winter
intense heat; hottest season; peak of summer's heat
"minor heat" solar term (approx. July 7)
severe heat; intense heat; oppressive heat
to summer; to go away for the summer