Near-record high temperatures broiling central San Joaquin Valley

A high-pressure system over the central San Joaquin Valley continued to heat the region Monday, bringing near-record temperatures to the area.

Fresno’s high Monday hit 94 – one degree short of the record set in 1964. Tuesday’s high is expected to hit 93, just short of the record of 95 set in 1991, the National Weather Service says.

On Saturday, Hanford set a record of 100 degrees, breaking the old record of 93 set in 1999. On the same day, Madera tied a record of 95 set in 1999. Fresno’s high of 97 was 2 degrees below the record of 99 set in 1991.

The weather service says the high pressure will begin to break down by mid-week and a weather system moving north from Baja California will bring a chance of showers and thunderstorms to the region by Wednesday.

The weather service warns that heavy rain and flash flooding are possible. The upside: Daytime temperatures should dip into the mid-80s by Thursday, and could be down to a more seasonable 80 by Sunday.

Air quality Tuesday will be unhealthy for sensitive groups in Fresno and Tulare counties and moderate in surrounding counties.