Visit Napa Valley posted a note to travelers on its website Monday: ”Due to road passage difficulty and poor air quality, please consider making alternate travel plans until the fires in Napa Valley have been contained.”

The tourism agency also posted that more than 20 wineries in the area were closed Monday, including Beaulieu Vineyard, Stags’ Leap, Trefethen and Beringer. The family-owned White Rock Vineyards — one of the area’s oldest, dating to 1870 — was destroyed, according to media reports.

Many luxury resorts were in the evacuation zone and/or had lost power because of the fires. The list of closures includes Calistoga Spa Hot Springs in Calistoga, Carneros Resort & Spa in Napa, Meadowood Napa Valley in St. Helena (closed at least until Sunday), Poetry Inn in Napa and Silverado Resort & Spa (which canceled reservations through Wednesday).

The Napa Valley Wine Train and the Napa Valley Wine Trolley also were shut to visitors Monday.

However, more than a dozen hotels and resorts, including Meritage Resort and Spa and the Napa River Inn, both in Napa, were open Monday. Check here for an updated list of what’s open and what’s closed.

Sonoma Valley tourism’s Facebook page Monday urged travelers “to enroll in free automated alerts from the Sonoma County Sheriff’s Department” before heading into the area.

Additionally Alaska Air, American Airlines and United Airlines have offered fee waivers for travelers who want to postpone or cancel their trips to fire-affected areas in Northern California.

In Santa Rosa, fires wiped out the 250-room Hilton Sonoma Wine Country Hotel and the smaller Fountaingrove Inn as well as smaller restaurants and businesses, according to media reports.

Below is a list of business that remained closed:

Hotels

• Auberge du Soleil open 10/20
• Calistoga Ranch open 10/20
• Calistoga Spa Hot Springs open 10/20 (pool 10/24)
• Indian Springs Calistoga and Spa open 10/20
• Las Alcobas open 10/23
• Motel 6 Napa
• Napa Valley Lodge open 10/20
• Silverado Resort & Spa open 10/28
• Trailside Inn open 11/3

Wineries & Tasting Rooms

• B Cellars open 10/21
• Baldacci Family Vineyards
• Brown Downtown Napa open 10/23
• Brown Estate open 11/2
• Burgess Cellars open 10/21
• Cliff Lede Vineyards open 10/20
• Crosby Roamann
• Durant & Booth open 10/21
• Hess Collection
• Kenzo Estate Winery
• Newton Vineyards open 10/23
• Nichelini Winery open 10/21
• Nickel & Nickel open 10/20
• Opus One
• Schramsberg open 10/20
• Signorello Estate
• Sinegal Estate Winery
• Stags’ Leap Winery open 10/20
• Summers Estate Wines open 10/20
• Yao Family Wines open 10/20

Restaurants & Activities

• 1313 Main Restaurant & Wine Bar
• Acacia House open 10/20
• Carpe Diem open 10/20
• PRESS open 10/23
• Sam’s Social Club open 10/20
• Skyline Wilderness Park
• The Restaurant at Auberge open 10/20