Hello, Ksenia!
Thank you for reaching out to us at planDisney! Although I do love a rainy day at Disneyland Resort, I know those big storms put a damper on many Guests' plans. I hope your family was able to stay safe and out of the rain!
Theme park availability is based on the type of ticket that you purchased. I just looked at the 
Theme Park Availability Calendar, and for standard tickets, it looks like there is currently availability for most days through the beginning of August. The 
Kids Special Ticket Offer is only good through March 10, 2024, and the 
So Cal Ticket Offer is valid on select days through June 2, 2024, but both are showing plenty of availability at this time. Perhaps Goofy accidentally goofed up the website temporarily, but go ahead and check again!
If you still experience issues, then it could be because of the date of your original tickets. There are different 
date-based tiers for theme park tickets. You may have purchased a ticket in a lower-priced tier but the upcoming days could be in a higher tier. If that is the case, you most likely need to upgrade your tickets by calling the 
Disneyland "Tickets" line. 
The 
Disney California Adventure Food & Wine Festival could take place during your upcoming visit, as it takes place from March 1 through April 22, 2024. When I visit during this time, I plan to eat fewer meals and instead, snack my way across the park. There are so many delicious options to choose from!
Ksenia, I hope this information was helpful. Please contact us again if you have additional questions!
Jen