Climate change is often discussed in terms of rising temperatures, stronger storms, and changing weather patterns. But its effects reach much further than the weather forecast. They can influence the quality of the air we breathe, the reliability of our water supplies, the safety of our workplaces, and the health of the communities where we live.
A new report from California's Office of Environmental Health Hazard Assessment (OEHHA), released on October 20, highlights how these changes are becoming increasingly visible across the state. The fifth edition of the Indicators of Climate Change in California Report tracks changes in the environment and human health, drawing on decades of scientific observations.
Among its findings, the report confirms an upward trend in average annual heat-related deaths. It also documents increasingly variable precipitation, significant forest loss, and the disappearance of glaciers in the Trinity Alps. These findings show why environmental health and climate preparedness need to be considered together.
When Rising Temperatures Become a Health Concern
Extreme heat is more than an uncomfortable condition. It can become a serious health hazard, particularly for people who work outdoors or in hot indoor environments.
Construction workers, agricultural employees, warehouse staff, and manufacturing personnel may face heat exposure during their regular workday. Without adequate water, rest, cooling, and training, employees can develop heat-related illnesses that may become life-threatening.
California's latest climate indicators report confirms that heat-related deaths have increased over time. It also highlights unequal impacts, with outdoor workers and lower-income communities often facing greater risks and fewer resources to prepare and recover.
For employers, this reinforces an important responsibility: heat safety should be part of everyday operations, not something addressed only when a heat advisory is issued.
Workplaces should review their heat illness prevention procedures, ensure employees have access to drinking water and appropriate cool-down areas, and train supervisors to recognize early warning signs. Employers should also consider indoor heat exposure, especially in warehouses, kitchens, manufacturing facilities, and other work environments where temperatures can rise quickly.
Preparing for heat is not just about compliance. It is about protecting the people who keep businesses and communities running.
Water Conditions Are Becoming Less Predictable
Another important finding concerns changes in precipitation. California has always experienced periods of drought and heavy rainfall, but the report describes increasing variability in precipitation, sometimes referred to as weather whiplash.
Rapid changes between dry conditions and heavy rain can create challenges for water management, infrastructure, agriculture, and public safety.
During dry periods, communities may face pressure on water supplies. When heavy rainfall follows drought, runoff can carry sediment and other materials into waterways. Areas affected by wildfire may be particularly vulnerable because burned or disturbed landscapes can lose some of their ability to hold soil in place.
These conditions make water quality monitoring and watershed management especially important. Water agencies, agricultural businesses, industrial facilities, and local governments need reliable information to understand changing conditions and prepare for potential impacts.
For businesses, it is worth reviewing how water is used, stored, managed, and protected at their facilities. Stormwater controls, drainage systems, spill prevention measures, and emergency plans all play a role in reducing environmental risks.
What Changing Forest Conditions Mean for Communities
California's forests are also experiencing significant changes.
According to the new report, an estimated 243 million trees died on California forest lands between 2010 and 2024. Large-tree density has also declined in several regions, including the Sierra Nevada highlands, the Coast Ranges, and Northern California.
Tree mortality has several contributing factors, including drought, insects, and disease. Changing climate conditions can intensify some of these pressures, leaving forests more vulnerable to environmental stress.
The consequences extend beyond the trees themselves. Forest conditions influence watersheds, wildlife habitats, soil stability, and the way landscapes respond to fire and rainfall.
When wildfire damages vegetation and exposes soil, subsequent rainfall can move ash, sediment, and other materials into streams and reservoirs. These changes can affect water quality and create additional work for communities and agencies responsible for monitoring and protecting water resources.
For organizations operating near forested areas or in regions vulnerable to wildfire, environmental planning should consider both immediate hazards and what may happen during recovery. Access routes, emergency communication, debris management, drainage, and post-fire monitoring can all become important parts of the process.
Environmental Risks Do Not Affect Every Community Equally
One of the most important aspects of environmental health is recognizing that people experience environmental hazards differently.
A community with limited access to cooling facilities, reliable water supplies, health services, or emergency transportation may face greater difficulties during extreme weather. Workers who cannot easily change their schedules or stop outdoor activities may also have fewer opportunities to avoid dangerous conditions.
OEHHA's report highlights how rural and lower-income communities, agricultural workers, and other outdoor workers can experience disproportionate impacts.
This is why effective environmental planning needs to consider more than statewide averages. Local conditions matter. The risks faced by a farmworker in the Central Valley may differ from those faced by a warehouse employee in an urban area or a community located downstream from a burned watershed.
Businesses and public agencies can make better decisions when they understand the specific conditions affecting the people, facilities, and communities around them.
What Organizations Can Do to Prepare
Climate-related risks can seem overwhelming, but practical preparation often begins with reviewing existing safety and environmental management practices.
Employers can evaluate heat illness prevention plans, emergency procedures, employee training, and access to drinking water and cooling. Facility managers can review stormwater controls, drainage, backup systems, and procedures for severe weather or service interruptions.
Organizations that use or manage hazardous materials should also consider how flooding, extreme heat, wildfire, or power outages could affect chemical storage, equipment, waste management, and spill prevention.
Regular inspections and accurate records help organizations identify weaknesses before conditions become more difficult to manage. Coordination with local emergency services and relevant environmental agencies can also improve readiness.
Not every organization will face the same risks, and not every solution will look the same. A useful starting point is identifying the hazards most relevant to the facility, the work being performed, and the surrounding environment.
Looking Ahead: Making Environmental Health Part of Everyday Planning
California's latest climate indicators report provides another reminder that environmental changes are not isolated events. They can influence public health, workplace safety, water resources, ecosystems, and the resilience of local communities.
For businesses, preparing for these challenges does not necessarily mean overhauling every operation at once. It means asking practical questions, identifying vulnerabilities, keeping plans current, and taking reasonable steps to protect employees and the environment.
As conditions continue to change, organizations that make environmental health and safety part of their regular planning will be better positioned to respond when unexpected challenges arise.
At Definitive Safety Group, we believe that protecting people and the environment begins with understanding risks and taking informed, practical action. By connecting environmental awareness with workplace safety and preparedness, organizations can build stronger operations and healthier communities.
Environmental responsibility starts with preparation. That's #theDSGway.
