Extreme heat arrives in Southern California. Here's how hot it will get

LOS ANGELES (KABC) -- Extreme heat arrives in Southern California on Tuesday, bringing humid conditions for some and scorching temperatures.

With monsoonal moisture in the atmosphere, rain and thunderstorm chances linger all week for our mountain and desert communities.

With another high-pressure system moving in, Wednesday and Thursday are expected to be the hottest days of the week, with many areas seeing triple-digit heat.

An Extreme Heat Watch has been issued for most of SoCal from Tuesday at 10 a.m. through Thursday at 8 p.m.

ABC7 has issued a Weather Change Alert for Tuesday as temperatures begin to climb and high pressure builds. A second Weather Change Alert is in place on Friday, as temperatures begin to fall back down to where we should be for this time of year.

Los Angeles and Orange counties on Tuesday will see a high of 89 degrees and a low of 69. Highs are expected to peak in the upper-90s on Wednesday.

The valleys and Inland Empire on Tuesday can expect humid conditions with a high of 103 degrees and a low of 68. Several days of triple-digit heat are ahead before temperatures begin to fall on Friday.

Beach communities on Tuesday will see a 10% chance of rain with lightning possible, with a high of 77 degrees and a low of 69. Highs are expected to peak in the low-80s on Wednesday.

Mountain communities will see a 40% chance of thunderstorms on Tuesday, with a high of 80 degrees and a low of 52. Thunderstorm chances linger in the forecast all week.

Desert areas on Tuesday will see a high of 104 degrees and a low of 80, with a 20% chance of thunderstorms. Palm Springs is expected to reach 109 degrees. Thunderstorm chances return on Thursday and stick around for the rest of the week.

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7-Day Forecasts

Los Angeles / Orange County Weather Forecast

Valleys and Inland Empire

Beaches

Mountains

Deserts