Carlsbad, California (CNN) -- San Diego County is hoping for a break Thursday, a day after wildfires ravaged the landscape, threatening homes, universities, a military base and a nuclear power plant.
"Let's hope for a calm day," said County Supervisor Dianne Jacob, who marveled at the outbreak that saw San Diego go from one wildfire to nine, charring more than 9,000 acres.
Firefighters deployed across the county, jumping on every hotspot that flared up.
"It's been a pretty amazing day," Jacob said Wednesday evening. "Everyone needs to be on high alert." Temperatures cooled overnight and the winds calmed, giving the crews fighting the flames a bit of a break.
Additional air tankers and firefighting helicopters will join the effort Thursday, according to Jacob. She said she's certain more fires will spring up with the new day, but was praying they wouldn't.
The region is bone dry after months of little rainfall and temperatures are brutally hot, especially for May. Wildfire season typically peaks over the summer and into the fall.
"The common theme statewide this year is unprecedented number of fires and fire activity across the state, in many cases two to three months earlier than normal," Ken Pimlott, director of the California Department of Forestry and Fire Protection, told CNN's "New Day."
Thursday will be the hottest day of the week, according to the National Weather Service, with forecast highs between 98 and 106.