People enjoy the view from a lifeguard structure as the sun sets at Seal Beach, south of Los Angeles, California on Monday. Much of the U.S. has been gripped by a relentless heatwave, sparking health warnings and sending people to makeshift cooling shelters.
What do you think makes a better city? Do you like a mix of old and new on the same block?
Several urban thinkers joined us for a discussion on Twitter, including Bruce Katz of the Brookings Institution, Carol Coletta of ArtPlace America, writer and blogger Aaron Renn, The Atlantic Cities editor Sommer Mathis and Diana Lind of Next American City.