On August 4, 2018, a national disaster was declared in Northern California, due to the extensive wildfires burning there.
In mid-July to August 2018, a series of large wildfires erupted across California, mostly in the northern part of the state. The catastrophic Camp Fire alone killed at least 85 people, destroyed 18,804 buildings and caused $16.5 billion in property damage, while overall the fires resulted in at least $26.347 billion in property damage and firefighting costs, including $25.4 billion in property damage and $947 million in fire suppression costs. Through the end of August 2018, Cal Fire alone spent $432 million on operations. In 2018, there were a total of 103 confirmed fatalities, 24,226 structures damaged or destroyed, and 8,527 fires burning 1,975,086 acres (799,289 ha), about 2% of the state's 100 million acres of land. It was also the largest on record at the time, now third after the 20 California wildfire seasons. For more detail, please see Cal Fire's official county maps for both state and local responsibility areas.The 2018 wildfire season was the deadliest and most destructive wildfire season in California history.
Note: KQED has simplified these maps for online display. After that, Cal Fire will work with local governments to develop new maps for those areas, too. The agency expects to release official maps next summer for "state responsibility areas" - the parts of California areas that it's responsible for protecting. "You don't want to zone that house based on what's there, but what could potentially be there," Sapsis says.Ĭal Fire hopes to start testing its new draft maps this winter. In urban areas, fires can move quickly through dense neighborhoods where homes are tightly spaced. The new maps are meant to show "where fires could go," not where they could start, Sapsis says.įor instance, development patterns can change how fire spreads. But the risk, or how much damage a fire can do, depends on the built environment. Those kinds of weather conditions are tricky to map, Sapsis says, because you want to take into account those very destructive types of fires, but also need to consider a longer, 50-year period.įire “hazard” is a measure of how a fire will behave, based on the physical conditions. and what the magnitudes of these events are," Sapsis says. "We're just now getting the capacity to estimate at a realistic scale what these areas, footprints, if you will, of these dry windy events are. Sapsis says that fire modeling technology is improving all the time, and that the new models Cal Fire is testing are taking into account dry, windy weather.
Original 2019 story continues below New Maps to Assess Weather and Development (Cal Fire was expected to release new draft maps to test in winter 2019/2020 that took new risk factors into account. We do the best we can based on the tools we have," he says.Īnd, as recent fires have tragically demonstrated, living outside a higher-risk zone doesn't mean that you're safe.Įxtreme winds drove much of the damage in Paradise during last the November 2018 Camp Fire and in the North Bay during the October 2017 fire siege, and current fire maps don't take that factor into account. "Estimating a burn probability is an estimate. Sapsis says it's important to remember that the Cal Fire-defined risk zones are showing only a probability.
"How likely is the fire? And what is the nature of the fire?" "The model is basically trying to describe areas and their likelihood for a structure to ignite," Dave Sapsis, a Cal Fire researcher who specializes in mapping and research models, told KQED in 2019.