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Tropical storm expected to fan California wildfires, cool off state


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A tropical storm approaching Southern California on Friday threatened to bring high winds that could whip up wildfires and heavy rainfall that could trigger flash floods, but the system will likely bring relief from a brutal, 10-day heat wave.

Tropical Storm Kay was expected to generate wind gusts of up to 100 miles per hour, fanning the flames of the Fairview Fire, which has already scorched about 27,000 acres (10,926 hectares) in Riverside County, east of Los Angeles.

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The fire, which was 5% contained, could force 22,000 people to evacuate before the storm inundates the area with heavy rain, fire officials warned.

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“We could go from a fire suppression event into significant rain, water rescues, mudslides, debris flows. We have challenging days ahead,” said Deputy Chief Jeff Veik of Cal Fire’s Riverside Unit on Thursday night during a community meeting.

The storm, which weakened from hurricane force overnight, was threatening Baja California, other parts of Mexico and the U.S. Southwest with heavy rains that could cause dangerous flash flooding, landslides and mudslides, the National Weather Service (NWS) said.

Parts of Baja California could see more than 10 inches (25 cm) while spots in Southern California could get 6 to 8 inches of rain from heavy downpours as Kay pushes inland on Friday and into the weekend, the service said.

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“Extended periods of moderate to heavy rain will be capable of producing rural and urban flooding,” the service said. “Those living in areas prone to flooding should be prepared to take action.”

Strong easterly winds of 40 to 50 mph with gusts up to 100 mph were also in the forecast for Southern California, the NWS said, warning that gusts could down trees and power lines and make travel difficult.

COOLER TEMPERATURES

The storm will also bring California much-needed relief from the scorching heat wave it has endured over the last 10 days, NWS meteorologist Bill South said.

It “will move over us tomorrow and provide us with some cloud cover and maybe some light rain and much cooler temperatures,” he said.

The forecast of cooler temperatures follows a string of days when conservation efforts helped the power grid avoid rotating outages, according to the California Independent System Operator (ISO), grid operator for most of the state.

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Edison International’s Southern California Edison utility, which serves five million customers in the southern third of California, was considering shutting off power to about 50,000 customers on Friday in order to lessen the risk of power lines igniting wildfires.

“The utility’s concern is the short window of time before the rains start. We don’t want any of the utility’s equipment to cause wildfires during that time,” said company spokesman David Song.

The grid came close to imposing rotating outages on Tuesday, when power demand hit an all-time high and electric prices spiked to two-year highs.

The ISO wants consumers to conserve energy during the late afternoon hours when the sun goes down and solar power stops working. Solar has provided about a third of the grid’s electricity during the middle of the day but nothing at night.

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High temperatures in Sacramento, the state capital, have topped 100 degrees Fahrenheit (37.8 Celsius) every day so far in September.

After hitting a record 112 on Thursday, meteorologists at AccuWeather forecast high temperatures in Sacramento would reach 106 on Friday before dropping to 87 on Saturday, when the heat wave breaks. That compares with the current record of 108 degrees for Friday in 1944 and a normal high of 90.

The ISO projected power demand would reach 46,278 megawatts (MW) on Friday and 35,013 MW on Saturday. That compares with the preliminary record of 52,061 MW on Tuesday, which broke the prior all-time high of 50,270 MW in 2006.

(Reporting by Scott DiSavino and Brendan O’Brien; editing by Bill Berkrot and Alistair Bell)

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