4th of July weekend heat wave

6/30/2011, 5 p.m.

LOS ANGELES, Calif.--Higher temperatures will come to the Southland today, ushering in a heat wave expected to last through the Fourth of July weekend and beyond.

"Strong high pressure ... will bring a rapid warming trend to the area for the holiday weekend," warned a National Weather Service (NWS) advisory. "The air mass will warm additionally through the weekend..."

The weather service said that "the coolest temperatures during this heat wave will occur at the beaches and ... closest to the coast, where the onshore breezes will cool the land mass most efficiently each afternoon and evening."

The advisory urged Southland residents to protect themselves and their loved ones during the heat wave by doing the following:

  • * Never leave children or pets unattended in a locked vehicle;
  • * Limit outdoor activities to the morning hours, when it is the coolest;
  • * Drink plenty of fluids;
  • * Check on friends and neighbors, especially the elderly.

The NWS forecast highs for Thursday of 70 in Avalon and Newport Beach; 72 at LAX; 76 in Long Beach; 80 in downtown L.A. and Anaheim; 82 on Mount Wilson; 86 in Burbank; 87 in San Gabriel; 88 in Pasadena; 92 in Newhall; 94 in Woodland Hills; and 98 in Palmdale and Lancaster.

NWS meteorologists said even higher temperatures are expected starting Friday, taking valley highs to the century mark and beyond.

"Overnight low temperatures may not offer much relief, with some foothills and desert locations remaining in the 70s to lower 80s through the weekend," according to the NWS advisory.