In the context of fire hazards, what does a red flag warning signify?

A red flag warning indicates an increased risk of fire due to specific weather conditions, making it crucial for individuals and communities to be vigilant about fire safety during that time. When issued, this warning is based on factors such as low humidity, high temperatures, and strong winds, all of which can contribute to the rapid spread of wildfires. During a red flag warning, it is particularly important for people to refrain from activities that could ignite a fire, such as outdoor burning or using equipment that generates sparks.

Other options, although related to weather conditions, do not pertain to fire risk. Heavy rain, severe thunderstorms, and heat waves represent different types of weather phenomena and their associated hazards, but they do not specifically indicate the elevated dangers related to fire conditions that a red flag warning signifies.