The state of California, and the LA basin in particular, was subject to a series of strong storms. Flooding was seen across the region.
1Blessed be Yahvah, my strength, who teaches my hands to war and my fingers to fight;
2my refuge and my deliverer; my shield and my helper, on whom I trust, who subdues nations under me.
3Yahvah, what is man, that you are knowledgeable of him? Or the son of man, that you are mindful of him?
4Man is like vapor; his days are as a shadow that passes away.
5Bow your skies, Yahvah, and come down; rebuke the mountains, and they will smoke.
6Cast forth lightning, and scatter them; shoot out your arrows, and destroy them.
7Stretch forth your hand from above; deliver me out of great waters, from the hand of the ungodly,
8whose mouths speak vanity, and their right hand is a right hand of falsehood.
9I will sing a new song to you, god; on a psaltery and an instrument of 10 strings, I will sing praises to you.
10It is he who gives salvation to kings; who delivers David, his servant, from the hurtful sword.
11Deliver me from the hand of the wicked, whose mouths speak vanity, and their right hand is a right hand of falsehood.
12That our sons may be as plants grown up in their youth; that our daughters may be as brides richly adorned after the fashion of houses;
13that our storehouses may be full to overflowing; that our sheep may multiply abundantly in our streets;
14that our cattle may be strong and there be none barren among them; that there not be stealing, and that there not be mourning in our streets.
15Happy is the people who have all these things; yes, happy is the people, whose god is Yahvah.
A dip in the jet stream carried storms that would normally be moderate and would normally hit Oregon and Washington, instead hit California at force.
Flash floods and storm surges along the coast caused significant damage. Many of the hills above LA, denuded of foliage from recent fires, were now turning into mudslides.
Verses 5 through 8 deal specifically with the events being seen in LA. Strong weather related storms from the skies. The "hills that smoke" are a reference to the hills around LA that had smoked and were now in fear of floods.
The region of LA is a city of messengers, and the remaining parts of the Psalm deal with proper messages.
Especially prominent is the prayer of deliverance that appears directed at the members of the government of the state of California itself. (Verse 11.) The state is basically in a stranglehold from special interests and unions.