Hot, Hotter, Hottest: Week Will Warm Up Daily, Triple Digits Friday

The week starts hot and will get hotter day by day, National Weather Service forecasters said early Monday.

From midweek through the weekend, forecasters predict a significant heat event and increased fire weather conditions in the Pasadena area.

For Monday and Tuesday temperatures will warm up by 4 to 8 degrees, although they will still be slightly below normal.

On Tuesday, temperatures will increase by 3 to 6 degrees as an upper high-pressure system expands. 

Related: City Warns Residents of Heat and Fire Dangers

The previously issued excessive heat watch will begin on Wednesday, according to the NWS.

Wednesday will bring slightly warmer temperatures as the upper high-pressure system shifts westward. Maximum temperatures will rise by another 3 to 6 degrees. 

Looking ahead to the long-term forecast from Thursday to Sunday in Los Angeles County, a consistently hot pattern is expected. 

Each day from Thursday to Friday, temperatures will increase by 2 to 4 degrees, with little change on Saturday. On Sunday, a minimal cooling of 1 to 2 degrees is expected. Additionally, overnight lows will be above normal.  This can increase the heat risk, especially for those without air conditioning.

Friday may see a temperature surge up to triple digits.

Looking further ahead, many weather models suggest that the heat will continue into the following week in Los Angeles County. 

Here is the day-by-day forecast from the NWS:

Today: Sunny, with a high near 87. Light and variable wind becoming south southwest 5 to 10 mph in the morning.

Tonight: Mostly clear, with a low around 60. Southwest wind 5 to 10 mph becoming light and variable after midnight.

Tuesday: Sunny, with a high near 91. Light south southwest wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 15 mph.

Tuesday Night: Mostly clear, with a low around 59. Southwest wind around 5 mph becoming south southeast after midnight.

Wednesday: Sunny and hot, with a high near 97. East wind 5 to 10 mph becoming southwest 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

Wednesday Night: Mostly clear, with a low around 67.

Thursday: Sunny and hot, with a high near 98.

Thursday Night: Mostly clear, with a low around 67.

Friday: Sunny and hot, with a high near 100.

Friday Night: Mostly clear, with a low around 64.

Saturday: Sunny and hot, with a high near 100.

Saturday Night: Mostly clear, with a low around 65.

Sunday: Sunny and hot, with a high near 98.