Amid Mexico’s heat wave and drought, suffering birds are getting air-conditioning and monkeys with heatstroke are being rescued by non-governmental groups.

The government, meanwhile, has been more preoccupied with cooling down animals at state-run zoos, giving lions frozen meat popsicles. It’s not the only frosty treat: One rescue group is feeding distressed owls with rat carcasses shipped in frozen from Mexico City.

A heat dome, an area of strong high pressure centered over the southern…