California’s weather moderated after a long siege of extreme heat but firefighters still faced the difficult task of trying to contain a large forest fire in rugged coastal mountains south of Big Sur.

The Willow Fire covered 4.4 square miles of Los Padres National Forest, the U.S. Forest Service said. More than 500 firefighters were on the lines, aided by planes and helicopters.

The fire broke out Thursday evening in the Ventana Wilderness and burned near the Tassajara Zen Mountain Center, a Buddhist monastery located in a remote valley.

A heatwave already punishing parts of the U.S. Southwest on Monday was expected to move into California this week, prompting the forecasters to warn of health and fire dangers.

A high-pressure ridge that built over southwestern deserts over the past few days is responsible for the unusually blistering heat this early in the year, National Weather Service meteorologist Karleisa Rogacheski said.

“Today last day of seasonable weather in California,” Rogacheski said.

California saw balmy weather on Monday, with temperatures in the upper 80s and low 90s Fahrenheit (30-35°C), but forecasts called for warming on Tuesday, spiking into the triple digits by Thursday and lasting several days.

Californians headed to campgrounds, beaches and restaurants over the long holiday weekend as the state prepared to shed some of its coronavirus rules.

Southern California beaches were busy with families barbecuing and children playing in the sand and surf. Business owners said they were scrambling to hire workers to keep up with the stream of customers eager to get out since virus cases have fallen and vaccinations have risen.

“It feels very, very close to normal,” Bob Alfera, a resident of seaside Santa Monica, told KCBS-TV.

Things look bad with California’s ever-sooner wildfire season seemingly approaching and what’s shaping up to be a severe drought across the Western U.S.

The plague of wildfires in the past few years in California have made things tough for residents and businesses, and in the last few years, larger and more frequent wildfires have been particularly bad for utilities.

One business segment that’s getting some bad breaks are contractors that work for utilities or that work in wildfire-prone areas.