Southland Bakes in Triple-Digit Heat Wave

As the week began with a scorching heat wave, the southland can expect to feel more summer heat, hitting a high of 109 degrees in Glendora Friday.

A strong high pressure over the southwestern part of the country, along with a weak onshore flow is driving up temperatures, according to an advisory from the National Weather Service.

Tuesday’s weather could hit a high of 105 degrees with an overnight low of 69 degrees. Temperatures will rise slightly each day, with a high of 109 degrees on Friday.

The coastal beach cities will offer some reprieve from the heat with temperatures in the 70s.

In the Angeles National Forest, rangers raised the fire danger level from high to very high Monday, because of the high temperatures and dried-out brush. Despite the "very high" fire danger designation, campfires are permitted in developed campgrounds, and camp stoves are allowed in the backcountry.

Thunderstorms, possible through Friday, also could trigger wildfires caused by lightning strikes.

NWS also warns the "excessive" and "hazardous" weather could be deadly for unprepared campers and hikers.

The weather service offers the following safety tips during this summer heat wave:

• Avoid strenuous outdoor activity as much as possible.
• Keep hydrated with plenty of non-alcoholic, non-caffeinated fluids.
• Wear light, loose-fitting clothing,
• Shield yourself from the sun with a hat.
• Apply sunscreen to avoid sunburn.
•  Take advantage of air conditioning and shade. 
•  Never leave pets and children in enclosed vehicles, even briefly.

- Compiled from City News Service reports.