Which of the following severe weather conditions should workers be most aware of?

The correct choice highlights severe weather conditions that can pose significant threats to workers, particularly in outdoor or exposed environments like substations. Floods can result in hazardous working conditions, destroying infrastructure and posing drowning risks. Lightning strikes are a major concern, especially for individuals working at elevated heights or in open areas where they may be more vulnerable. Tornadoes can produce destructive winds and debris, necessitating immediate safety measures. Winter storms can also create extremely hazardous conditions, including icy roads and reduced visibility, affecting both safety and accessibility.

In contrast, the other options, while they do mention severe weather, focus on conditions that may be more manageable or less urgent in terms of immediate threat to worker safety. For example, sunny days might seem benign, while thunderstorms can lead to increased risk but aren't typically as severe as tornadoes or flooding. Windstorms, blizzards, and hailstorms, while significant, don't encompass as wide a variety of life-threatening scenarios compared to those listed in the correct choice. Heat waves, droughts, and dust storms certainly have their own hazards, primarily related to health and visibility, but they do not present the same immediate physical threat in terms of destructive force as floods and tornadoes. Thus, the awareness of the specified conditions in