Wildfires barrel toward Northern California lake towns

San Bernardino County Fire department firefighters assess the damage to a neighborhood in the aftermath of a wildfire, Sunday, July 29, 2018, in Keswick, Calif. (AP Photo/Marcio Jose Sanchez)
Firefighters with Cal Fire Mendocino Unit cover themselves from smoke and ash created by an advancing wildfire Monday, July 30, 2018, in Lakeport, Calif. A pair of wildfires that prompted evacuation orders for thousands of people are barreling toward small lake towns in Northern California. (AP Photo/Marcio Jose Sanchez)

An air tanker drops retardant on a wildfire burning near Lakeport, Calif., on Monday, July 30, 2018. A pair of wildfires that prompted evacuation orders for thousands of people are barreling toward small lake towns in Northern California. (AP Photo/Noah Berger)

LAKEPORT, Calif. — A pair of wildfires that prompted evacuation orders for nearly 20,000 people barreled Monday toward small lake towns in Northern California, and authorities faced questions about how quickly they warned residents about the largest and deadliest blaze burning in the state.