Three wildfires in California have displaced hundreds of thousands of people and destroyed thousands of homes. So far, dozens of people have been confirmed dead and hundreds more are missing.

Vast expanses of land have been scorched in Northern California by the Camp Fire — the deadliest and most destructive wildfire in the state’s history — and in Southern California by the Woolsey and Hill Fires.

Here’s how you can help.

Research before you donate

Remember to do your research on a charity’s reputation for using donations effectively. Charity Navigator is a good source to consult.

Also, remember that sending money is almost always the most efficient way to help in a disaster, according to the Center for International Disaster Information, part of the United States Agency for International Development.