If you’re planning on driving up to Yosemite, here are some things you should know about the Ferguson Fire raging out of control at the national park’s western edge:

Is the park open?

Yes. But if you’re thinking of going up, leave early to avoid the worst congestion. Park officials recommend summertime visitors arrive in the park before or after peak hours, which means before 9 am or after 5 pm.

Are all roads into the park open?

Highway 140, one of the main entry routes into Yosemite Valley, remains closed due to the fire. Travel is prohibited from the small town of Midpines to El Portal Road. Also, travel on 140 is limited to one-way controlled traffic 20 miles east of Mariposa due to slide repairs. This restriction is in effect 24 hours a day, seven days a week. Instead of 140, use highways 120 and 41 to reach Yosemite.

Signs along HWY 140 warning drivers to turn around. Closure in place Mid Pines area to El Portal. @ABC30 pic.twitter.com/A3v5s6NYEW — Vanessa Vasconcelos (@VanessaABC30) July 15, 2018

Are there any other travel restrictions inside the park’s boundaries?

No. But be ready for a crush of visitors clogging the park’s roadways.

What’s the weather look like this week?

You’ll find high temperatures, low humidity and light winds, all factors that have helped spread the Ferguson Fire. Daytime highs will range from 89 to 94, with nighttime temperatures dropping to as low as 66 on some nights. There’s a slight 15-percent chance of rain on Saturday and Sunday.

Where are the fire operations currently taking place?

You probably won’t see any firefighters in the park itself because the Ferguson is burning along the south fork of the Merced River, which is located 21 miles to the west of the valley floor.

What about the smoke?

You will, however, see the fire’s smoke, which has now drifted into Yosemite Valley and is partially obscuring views of iconic sites like Half Dome and Yosemite Falls. Here’s a recent view from the National Park Service’s webcam at Awahnee Meadow in the middle of the valley:

Is the air safe to breathe?

The park’s website warns visitors to expect smoky conditions. “Visitors to Yosemite should expect poor air quality and limited visibility due to the Ferguson Fire. Smoke may be heavy at times, and visitors should be prepared to limit any heavy outdoor activity during the periods of poor air quality.”

Will traffic in and around the park be bad?

Roads into the park and inside the valley are often clogged with bumper-to-bumper traffic, even more so during the summer tourist season. The park’s website puts it this way: “While we welcome you to Yosemite, you should expect traffic congestion, especially in Yosemite Valley and at park entrances. Be prepared for multiple delays, up to two- to three-hours, especially in afternoons and on weekends.”

Is lodging still available inside the park?

Lodging options in Yosemite National Park range from simple tent cabins at the High Sierra Camps to deluxe rooms at The Majestic Yosemite Hotel, formerly The Ahwahnee. You can find out about availability by visiting the Yosemite Hospitality (Aramark) website. As of Tuesday morning, rooms were still available this week at several of the park’s lodges, including the Majestic Yosemite and Big Trees Lodge.

Could this fire get worse before it’s brought under control?