Jeremiah Keller toddled around, clad only in his last diaper, the hot, smoky air surrounding him. His mother — exasperated from two days of fleeing, seeking help, wondering about the future — struggled to stop the 18-month-old from running into the parking lot. The family has done a lot of running in the past few days. As wildfires closed in on towns across California, they and thousands of others had to evacuate, leaving the fates of their homes and their neighbors a mystery as the fires blazed through dry lands.