Ahead of fire season intensifying across California, Cal Fire crews are training for a time when wildfires can be especially vulnerable: overnight.At McClellan Airfield, pilots, crews, and command staff took part in a nighttime aerial firefighting exercise designed to prepare them to battle wildfires after dark, when cooler temperatures and higher humidity can help slow fire activity.Before the night flights began, crews conducted a daytime reconnaissance mission over a simulated fire near...