(NewsNation) — Thousands of people had to evacuate their homes over the weekend in California and Nevada as fast-moving wildfires ravaged the states.

One in Angeles National Forest in California, the Bridge Fire, broke out in the last 24 hours. Crews report zero containment so far.

Firefighters tell NewsNation that they’ve been working on the Bridge Fire throughout the night. Getting to the flames, however, is difficult because not a lot of roadways lead to the areas that are on fire. Ravines make it tough to get into active fire zones, and all the dry bush is making things even more challenging, the firefighters said.

Another huge fire at the edge of California’s San Bernadino National Forest called the Line Fire, was just 3% contained as of Monday afternoon. It charred about 32 square miles of grass and brush and blanketed the area with a thick cloud of dark smoke. Three firefighters were injured, per a state website, and more than 35,000 structures are under threat. California Gov. Gavin Newsom on Saturday proclaimed a state of emergency in San Bernardino County. Redlands Unified School District canceled classes Monday, affecting around 20,000 students.

The National Weather Service for San Diego said the Line Fire caused pyrocumulus clouds to form, creating “very dangerous conditions for firefighters.”

In Nevada, a fire outside Reno originating in Davis Creek Regional Park ignited Sunday afternoon, growing to about 10 square miles by Monday. That is also at 0% containment.

Nevada Gov. Joe Lombardo on Sunday said about 20,000 people were evacuated from neighborhoods, businesses, parks and campgrounds. Parts of south Reno were still under this evacuation order, with some homes and businesses in the area without power.

The Associated Press contributed to this report.