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A heat wave that began on Tuesday will intensify today and last through Thanksgiving with temperatures rising into the 80s at the coast and into the 90s across inland valleys and foothills. The National Weather Service says the hot weather will peak today with temperatures reaching 88 in San Diego — about 20 degrees above average — and the low 90s in Poway and 92 in Escondido. A dome of high pressure is preventing cool, moist air from flowing into Southern California — a pattern that’s not unusual in late autumn.

Angelenos can expect a hot Thanksgiving this year, with record-breaking temperatures forecast across the region. The mercury is expected to steadily rise throughout the week, with Wednesday and Thursday forecasted to be the hottest days. Forecasters predict a high of 89 degrees in downtown Los Angeles on Wednesday, which would tie a record set in 1950, and 87 degrees on Thursday, said Kathy Hoxsie, a meteorologist with the National Weather Service. At Los Angeles International Airport, temperatures will reach 86 and 84 on Wednesday and Thursday, respectively.

San Diego Mayor Kevin Faulconer is moving ahead with the city’s plans to buy power from someone other than San Diego Gas & Electric, but he’s given the power company a chance to make its case to preserve its monopoly. The city has an ambitious plan to fight climate change. It says 100 percent of electricity sold within city limits must come from renewable sources by 2035. Right now, SDG&E is the greenest major power company in the state but still gets most of its power by burning natural gas.

Severe drought, dwindling local water supplies and the high costs associated with imported water have many utilities looking for new ways to increase their local drinking water supplies to fill future needs. In Southern California, several public and private utilities have chosen water reuse as the answer to these problems. “In California, these treatment processes are called AWT’s, or advanced water treatment plants,” said Mehul V. Patel, P.E., Orange County Water District’s (OCWD) director of water production.

A water main break in Mission Hills erupted early Wednesday morning leaving some without water service for part of the day. A break on an 8-inch diameter water main was reported at 3:45 a.m. Wednesday near the intersection of Fort Stockton Drive and Ibis Street in Mission Hills. It was shut down at about 5 a.m. City of San Diego Public Utilities Department crews quickly capped the line but repairs had to continue into the afternoon.