WASHINGTON (AP) — Burning time for North American wildfires is going into overtime. Flames are lasting later into the night and starting earlier in the morning because human-caused climate change is extending the hotter and drier conditions that feed fires, a new study found.Fires used to die down or even die out at night as temperatures dropped and humidity increased, but that’s happening less often. The number of hours in North America when the weather is favorable for wildfires is 36% higher than 50 years ago, according to a study Friday in Science Advances.Places such as California have 550 more potential burning hours than the mid-1970s. Parts of southwestern New Mexico and central Arizona are seeing as much as 2,000 more hours a year when the weather is prone to burning fires, the highest increase seen in the study, which looked at Canada and the United States. The research looked at times when conditions were ripe for fire, but that didn’t mean fires occurred during all that time.Recent big fires in LA and Hawaii burned at nightFires that surge at night are tougher to fight and included the Lahaina, Hawaii fire in 2023, the Jasper fire in Alberta in 2024 and the Los Angeles fires in 2025, the study said. Maui’s fire ignited at 12:22 a.m.AdvertisementAdvertisementIt’s not just the clock that is getting extended. The calendar is too. The number of days with fire-prone weather increased by 44%, which effectively added 26 days over the past half century.It’s mostly from warmer, …
