This is a huge victory not only for workers' rights, but for climate justice. One of the main reasons for the strike, which would have been the largest single-employer strike in history, was the lack of protections from heat-related injuries. https://www.nytimes.com/2023/07/25/business/economy/ups-teamsters-contract-strike.html
UPS and Teamsters Reach Tentative Deal to Head Off Strike

United Parcel Service faced a potential walkout by more than 325,000 union members after their five-year contract expires next week.

The New York Times
340,000 UPS drivers poised to strike over extreme heat, safe working conditions

The UPS strike will be the largest single-employer strike in U.S. history. It could frame worker power as an extreme heat solution.

Grist
Worth saying that AC is a necessary but imperfect solution (it helps prevent heat stroke but burn fossil fuels). Things like increased pay are a big help because it lessens the pressure to overwork to heat exhaustion.
What we really need to mitigate the impacts of heatwaves on workers are structural policies like a strong Occupational Safety and Health Administration federal workplace heat standard that protects employees from exploitation and overworking as climate change gets worse.
@luckytran
And often it's load profile often matches the generation timeline of solar panels and other renewables avoiding energy surpluses (negative prices) in high renewable electrical grids such as Germany, N Australia, .... and now, surprisingly, Texas. There have been several days of negative prices over past summers in those markets