Hawaii wildfires: How did the Maui fire start and what we know about the Lahaina blaze?

This photo provided by County of Maui shows fire and smoke filling the sky from wildfires on the intersection at Hokiokio Place and Lahaina Bypass in Maui, Hawaii on Tuesday, Aug. 8, 2023. 

Wildfires on Hawaii's Maui island and Big Island have killed at least 55 people, forced thousands of residents and tourists to evacuate, and devastated the historic resort city of Lahaina. Here are some key questions and answers about the disaster.

How did the fires start?