CONCORD, Calif. (KGO) -- A spike in temperature made for a hot, but beautiful summer day across the Bay Area.
A heat advisory was in effect Monday and it has caught many people off guard after it had recently been unusually cool.
Officials with the National Weather Service issued a heat advisory for part of Monday for all inland areas of the San Francisco and Monterey Bay regions, including the Santa Clara Valley. Forecasters say the advisory is in effect from 1 p.m. to 8 p.m., with with highs in the mid 80s, mid 90s and lower 100s in spots. They say Monday will feel particularly warm because temperatures recently have been cooler than normal.
The drought is not stopping anyone from finding ways to cool off and what better place than Waterworld California where there are one million gallons of recycled water pumping through the park. Waterworld California says there's plenty of fun in the sun while also being mindful of water conservation.
"We made huge strides to reduce water usage and also water waste," said Al Garcia of Waterworld California.
The park has spent $2 million so far to make the upgrades. The savings are expected to be huge.
"One of them is new filters reduce water waste 90 percent," Garcia said. "All our pools have been thermo-sealed to prevent underwater cracks. We've also limited landscaping in the park."
The park is now open every day of the week just in time for the triple digit weather to hit the inland parts of the Bay Area. The heat advisory that's in effect until 8 p.m. brought a lot of high school seniors out to Waterworld California Monday afternoon to cool off.
"I heard it's going to be the hottest day of the year, at least so far this summer," said Ryan Ogborn.
"It is so hot you can't stand on the ground. We were walking to get food we were skipping around like dancing. I just couldn't take it anymore had to run to the shade," said Jacob Neel.
Many people tried to beat the heat by walking their pets or playing with their kids earlier in the day. The heat is nothing new for those who live in the East Bay, but people say they're now trying to acclimate, once again.
"I don't know if it feels hotter because it hasn't been as hot it feels more intense," said Andy Mathis.
The hot weather for the most part has been a welcome change. Cream in Walnut Creek has been gearing up for the surge in customers. People of all ages say it's nice to finally work on their tan.
On Tuesday, a low-pressure system will pull remnant moisture into Southern California from former Hurricane Blanca, now a tropical storm southwest of Mexico's Baja California peninsula. Forecasters say humidity will increase along with a chance of showers, a slight chance of thunderstorms and heavy localized rainfall.
Thunderstorms are forecast in much of Northern and Central California on Tuesday, creating the potential for wildfires.
An advisory means that forecasters expect hot temperatures and the combination of heat and humidity can cause heat illnesses, such as heat stroke and heat exhaustion.
Weather officials suggest residents and visitors drink plenty of fluids, stay in air conditioning and check on relatives and neighbors. Weather officials are reminding people to avoid leaving kids or animals in a vehicle during hot weather because the interior can get dangerously hot quickly.
The Associated Press and Bay City News contributed to this report.