Some California event ideas:
The Big One
*City* was just devastated by a savage earthquake! Reports are still coming in, but the damage is estimated to be severe in some parts of the city. Emergency crews are working overtime to assess the damage and locate the missing. The citizens are looking to the government for hope.
Put the earthquake recovery plans in action! (-500? Gold. The City loses 1 population, but no buildings)
Send in emergency supplies! (-250 Gold? -x food for x turns? No population lost, but a random building destroyed)
Get under the tables! (City loses 1 population and a random building is destroyed)
That one's playing a little fast and loose, but I think it's a pretty balanced event, especially for one with some negative effects. All depends on the cost.
Silicon Valley
Several entrepreneurs in *city* have achieved various technological innovations, transforming a formerly rural area into a lucrative oasis for business. More and more of our up and coming businessmen have begun to flock to the area to feed on its culture of success, creating a dynamic and growing young professional community. What should we do to capitalize on this historic "brain gain?"
Give these geniuses room to work! (+1 Science in *city* per specialist, +1 population in *city*)
Sign these men to government contracts! (-?00 Gold, Gain 1 Great Scientist?/Engineer?, +2 Scientist specialists in *city*?)
The Scientist/Engineer might be enough on its own, but I'm not sure how balanced these options are against each other.
The Mother Lode
Miners digging in the hills around *city* (the City must have a Gold resource in the city radius) have struck a huge deposit of gold! Nuggets of astonishing size have been making their way to our banks. News of the find has already begun to spread and thousands of citizens are considering moving to *city* in the hopes of striking it rich!
Encourage settlers to move to *city*! (-?00 Gold, +1 population in City, +2? Gold from Banks)
Allow the miners to manage their find! (-?00 Gold, gain a Great Merchant)
The Big One gave me an idea for an event for Texas as well (which will functionally be similar to the Big One, but I figure both California and Texas might end up with a third event to offset the disaster, despite their flavor, anyway):
The Great Storm (Galveston)
A powerful hurricane has just made landfall in *city*! (must be a coastal city) Thousands of homes have been flooded and businesses have come to a standstill. Volunteers are searching throughout the city to locate the missing and rescue the stranded. What assistance can we offer to our beleaguered city?
Repair the infrastructure! (-500? Gold. The City loses 1 population, but no gold from trade routes)
Send in emergency supplies! (-250 Gold? -10%? Gold from Trade Routes in this city)
That's what they get for building a city there! (City loses 1 population and -10% Gold from Trade Routes in this city)
Texas Oil Boom
A small farmer tending to his fields has found a spring of black liquid bubbling up on his land. When he had a professional take a look, he was told he'd just found a new source of Oil! Though the farmer has sold his lands, became filthy rich, and decided to move to Beverly Hills, his discovery has prompted many of our citizens to look more closely at their lands and it appears that several have found sizable deposits of "Black Gold."
Bring the new oil fields under government control! (-?00 Gold. 1/2/3? Oil resources generated in Texas territory, +1 Gold from each Oil resource)
Let the citizens develop our oil fields! (-?00 Gold, 1/2/3 Oil resources generated in Texas territory. +1 population in each city)
Not sure how balanced that one is, but I figured sometimes it might be better to take the Gold, sometimes the population.
The Alamo
The garrison in *city* has come under attack from *Civ*! Several famous citizens have resolved themselves to defend it to the last man but are unlikely to hold out without our help. How should we respond to this nefarious incursion?
Send forces to their defense! (-?00 Gold, gain 5 free Mounted Units, declare war on *Civ*)
Let us remember their sacrifice! (No war with *Civ*, gain Alamo World Wonder in *City*)
This one was kind of hard for me to work together. I didn't want to use barbarians because that would belittle Mexico. So I opted for an intrigue approach. It can be a
casus belli against a Civ with a gold cost and some free Units, OR you could opt not to pay the gold and get the World Wonder instead. I'm sure the first option might need to be incentivized a bit more to balance it out but I like the idea, PLUS it gets your Alamo wonder out there for people who don't have it (could forgo Rifling if using the Event to build it, and maybe a Tourism yield too?) Forgive me if that idea is a bit forward, though
Also, lemme know if I'm stepping on any Texas decisions here. I'm not sure which ones you've gone with, if any, yet. If you have none, I might convert the Oil Boom event into a Decision and find a new event. After all, I'm just spitballing atm