cities like los angeles where dark pavement and buildings can absorb heat bringing little relief overnight. skid row is an urban heat island which is why water is crucial when temperatures hit triple digits. free water. free water. reporter: that s why volunteers with water drop l.a. are checking up on the unhoused and the elderly. did y all want water? sure. reporter: handing out cold water to those who need it. at the core we re all people and should care and love each other. reporter: the extreme heat wave also testing california s power grid. in irwin dale, southern california edison crews are moving transformers. we have all hands on deck ready to respond if there are outages so that we can get the power restored as quickly and safely as possible. reporter: many californians bracing for more misery ahead. it s insane. it s unbearable to even be home.
as residents do what they can to stay cool. across the west, the scorching heat is showing no signs of cooling off this holiday weekend. our a.c. at home could only do so much when we re in these triple-digits. reporter: in glendale, california, residents are seeking refuge at the galleria shopping mall. getting out to the mall and getting out of house to get a cool relief is nice. california is in the midst of the longest heat wave of the year. a major concern especially in large cities like los angeles where dark pavement and buildings could easily absorb heat bringing little relief overnight. skid row is an urban heat island which is why water is crucial especially when temperatures hit triple-digits. free water! reporter: that is why volunteers with water drop l.a. are checking up on the unhoused an the elderly.