 These healthy changes come in response to careful, gradual exposure to heat stress and can make hot days feel a little more bearable. But heat can be particularly dangerous for people in poor health or those who aren't used to it. Health experts recommend staying hydrated, informed, and self-aware, and staying cool as much as possible on really hot days. Ping Huang, NPR News. Unionized TV and film workers in Hollywood have overwhelmingly voted to accept a three-year contract with entertainment companies.