Here are a few important resources focused on preparedness and response to extreme heat events.
Centers for Disease Control and Prevention (CDC) - The CDC has specific guidance on extreme heat, including a variety of infographics and social media graphics.
Great Lakes for Farmworker Health & Wellbeing at University of Illinois Chicago: Farm and farm worker safety resources (including several for heat and many in Spanish) from NIOSH centers.
National Insititute for Occupational Safety and Health (NIOSH): Heat related workplace precaution and prevention.
National Integrated Heat Health Information System - The NIHHIS is an integrated system that builds understanding of the problem of extreme heat, defines demand for climate services that enhance societal resilience, develops science-based products and services from a sustained climate science research program, and improves capacity, communication, and societal understanding of the problem in order to reduce morbidity and mortality due to extreme heat. The NIHHIS is a jointly developed system by the Centers for Disease Control and Prevention (CDC) and the National Oceanic and Atmospheric Administration.
NWS HeatRisk - An interactive map created by the National Weather Service that provides a 7-day forecast for potential heat related risks based on geographical location.
OSHA: Tips for employers to protect workers from heat-related illness.